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SOLDOUT: Zenith El Primero Chronomaster Open-Heart Dial 03.1260.4021 Automatic 45MM Chronograph Box
SOLDOUT: Zenith El Primero Chronomaster Open-Heart Dial 03.1260.4021 Automatic 45MM Chronograph Box
🕰OVERVIEW
This is an authentic Zenith El Primero Chronomaster Open 03.1260.4021, a beautifully executed automatic chronograph featuring Zenith’s iconic open-heart dial—revealing the rhythmic motion of the legendary El Primero movement beneath. The combination of classic case lines, a clean dial layout, and the partially exposed escapement gives this model a perfect blend of technical artistry and timeless design.
This example is in Mint Condition, complete with the full factory bracelet links, making it suitable for wrists of nearly any size. The watch runs on Zenith’s high-beat El Primero movement, renowned for its precision, smooth chronograph operation, and rich horological heritage.
Complete with the factory Zenith box (as pictured), this is a beautifully preserved example of one of Zenith’s most recognizable modern chronographs.
Watch Details Below:
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CASE: Factory Zenith Case in Mint Condition
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BRACELET: Factory Zenith Bracelet in Mint Condition — Full Links
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DIAL/HANDS/BEZEL: Factory Zenith Handset and Open-Heart Dial
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MOVEMENT: Factory Zenith El Primero Automatic Chronograph Movement
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BOX and PAPERS: Factory Zenith Box Only (As Pictured)
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YEAR: 2009 (Estimated)
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SIZING: 45MM
A refined and collectible Zenith Chronomaster Open — a mint, full-link example that’s been carefully preserved and is ready for its next enthusiast.
✔AUTHENTICITY GUARANTEED
We’re a U.S.-based dealer in Virginia. All watches are inspected, tested, and Guaranteed Authentic — or your money back.
↷HASSLE FREE RETURNS
2-day no-questions-asked return policy on watches. Item must be in original condition. See full return policy. Buyer pays return shipping.
🔄TRADE-IN OPTIONS
Have a watch to trade? Get a competitive offer toward this one. Contact us to get started.
🚚FAST INSURED SHIPPING
FedEx 2-Day shipping, fully insured and signature required. Orders ship within 48 hours of cleared payment.
📍IN-PERSON PICKUP
Located in Vienna, VA. Appointments only — email us to schedule a visit.
🕰OVERVIEW
This is an authentic Zenith Chronomaster Sport 03.3100.3600/69.M3100, a 41MM modern chronograph powered by Zenith’s groundbreaking El Primero 3600 automatic movement, capable of measuring 1/10th of a second. Featuring the white dial with overlapping tricolor subdials and black ceramic bezel, it delivers the unmistakable look and technical mastery that has made the Chronomaster Sport one of the most sought-after Zenith models.
This 2023 example is in Near Mint Condition (approx. 9.5/10), with only light wear visible under close inspection. The factory Zenith bracelet is also in near mint condition and comes with full links for a complete fit.
Complete with the factory Zenith inner and outer box, papers, and booklets (as pictured), this watch is offered as a full set.
Watch Details Below:
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CASE: Factory Zenith Case in Near Mint Condition (Approx. 9.5/10), Light Wear
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BRACELET: Factory Zenith Bracelet in Near Mint Condition with Full Links
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DIAL/HANDS/BEZEL: Factory Zenith White Dial with Tricolor Subdials, Handset, and Black Ceramic Bezel. Bezel is pristine.
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MOVEMENT: Factory Zenith Automatic El Primero 3600 Chronograph Movement
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BOX and PAPERS: Factory Zenith Inner & Outer Box with Complete Paperwork (As Pictured)
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YEAR: 2023
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SIZING: 41MM
This is your chance to own a Zenith Chronomaster Sport El Primero — a near-mint, full-set example of one of Zenith’s most coveted modern chronographs, ready to wear and enjoy.
✔AUTHENTICITY GUARANTEED
We’re a U.S.-based dealer in Virginia. All watches are inspected, tested, and Guaranteed Authentic — or your money back.
↷HASSLE FREE RETURNS
2-day no-questions-asked return policy on watches under $10,000. Item must be in original condition. See full return policy. Buyer pays return shipping.
🔄TRADE-IN OPTIONS
Have a watch to trade? Get a competitive offer toward this one. Contact us to get started.
🚚FAST INSURED SHIPPING
FedEx 2-Day shipping, fully insured and signature required. Orders ship within 48 hours of cleared payment.
📍IN-PERSON PICKUP
Located in Vienna, VA. Appointments only — email us to schedule a visit.
✔AUTHENTICITY GUARANTEED
All watches we sell are Guaranteed Authentic. We have a physical storefront in McLean, Virginia, and all of our watches undergo a multi-point inspection to ensure authenticity. All watches are Guaranteed Authentic or your money back.
🔄TRADE-IN OPTIONS
Looking to upgrade? Trade in your current watch towards this watch? We offer competitive trade values and a seamless process. Contact us today to learn how you can turn your current watch into your next treasure!
↷HASSLE FREE RETURNS
All watches below $10,000 sold on our website or in-store come with a 3-day no-questions-asked return policy. Read more about our Returns and Refunds here.
🚚FAST INSURED SHIPPING
We only use FedEx Priority Shipping and we always fully insure every package. We have shipped hundreds of watches over the years and have never had an issue with shipment! We try our best to ship the same day of order.
📖THE LITTLE DETAILS
OVERALL: Fantastic condition, around 9/10 overall. Complete with Factory box and papers including card
CASE: Factory Zenith Case, only light surface wear, around 9/10
BRACELET: Factory Zenith Metal Bracelet, only light surface wear around 9/10. Watch comes with full links
DIAL/HANDS/BEZEL: Factory Zenith Dial, Handset, and Blue Bezel
MOVEMENT: Factory Zenith El Primero Movement running without issues
BOX and PAPERS: Factory Zenith Box and Paperwork as pictured
YEAR: 2022
💡WHY THIS WATCH
The Zenith El Primero Chronomaster Sport 03.3100.3000/69.M3100, introduced in 2021, is a testament to Zenith's legacy of innovation in chronograph design, which began with the revolutionary El Primero movement in 1969, known for being the world's first automatic high-frequency chronograph movement. This model is special for its state-of-the-art El Primero 3600 movement that can measure time intervals to the nearest 1/10th of a second, showcasing an evolution in precision and functionality. The watch features a 41mm stainless steel case with a ceramic bezel, and a tri-color dial that offers a visually striking and more detailed aesthetic compared to many of its peers. What makes the Chronomaster Sport particularly noteworthy is that it serves as a great alternative to the Rolex Daytona due to its superior movement capabilities and a more interesting, dynamic dial. The Chronomaster Sport combines historical significance with cutting-edge watchmaking, providing a luxurious, high-performance option for those who seek a sophisticated, yet technically superior alternative to more traditional models in the luxury chronograph segment.
📦AVAILABLE FOR PICKUP
Want to see this watch in person? We are located in McLean Virginia off of Chain Bridge Road. We are by appointment only (no walk-ins), so please shoot us an email to schedule a time and get the address.
⚖TERMS
Watches to which a warranty will be provided will be indicated as such in the listing. No warranties are assumed unless explicitly stated in the listing. For watches that are covered under Warranty, the Warranty Period is from the Invoice Date. Warranty does not cover accidental, misuse/mishandling, water damage, and watches running fast or slow. Alterations or repairs by a third party will void the warranty. Warranty only applies to US transactions and to the original purchaser; it is non-transferable.
✔AUTHENTICITY GUARANTEED
All watches we sell are Guaranteed Authentic. We have a physical storefront in McLean, Virginia, and all of our watches undergo a multi-point inspection to ensure authenticity. All watches are Guaranteed Authentic or your money back.
🔄TRADE-IN OPTIONS
Looking to upgrade? Trade in your current watch towards this watch? We offer competitive trade values and a seamless process. Contact us today to learn how you can turn your current watch into your next treasure!
↷HASSLE FREE RETURNS
At Wearing Time, we strive to ensure that our customers are completely satisfied with their purchases. We understand that sometimes a return may be necessary, and we aim to make this process as smooth as possible.
3-Day Return Window: You may return most items purchased from Wearingtime LLC within 3 days of the delivery date. All returns must meet the criteria outlined in our return policy.
☑ONE YEAR WARRANTY
This watch is covered by a 1 Year Warranty from the date of invoice.
🚚FAST INSURED SHIPPING
We only use FedEx Priority Shipping and we always fully insure every package. We have shipped hundreds of watches over the years and have never had an issue with shipment! We try our best to ship the same day of order.
📖THE LITTLE DETAILS
OVERALL: In excellent condition, this watch just came back from a full overhaul by Zenith, so it includes a warranty from Zenith
CASE: Factory Zenith croc strap, brand new. Comes on a Factory Zenith Tang Buckle, brand new.
DIAL/HANDS/BEZEL: Factory Zenith Bezel, Dial and Handset.
MOVEMENT: Factory Zenith Flyback Chronograph Movment running flawlessly, just received a full service
BOX and PAPERS: Factory Zenith Travel Box and Service Papers. Watch is Under Zenith Warranty.
YEAR: 1990's (estimate)
SIZING: 40MM
💡WHY THIS WATCH
The Zenith El Primero Rainbow Flyback Chronograph was originally developed in the 1990s, inspired by a request from the French Air Force for a high-performance, durable, and highly legible pilot’s watch. This model is special for its flyback function, a critical feature for aviators that allows the chronograph to be reset and restarted with a single push, ideal for quick time measurements. It stands out with its colorful dial, where each chronograph register is accented with different colors—hence the "Rainbow" name—to enhance readability and offer a vibrant, distinctive look. The watch is powered by the El Primero movement, Zenith's flagship chronograph mechanism known for its exceptional accuracy and a high beat rate of 36,000 vibrations per hour. The Zenith El Primero Rainbow Flyback Chronograph combines practical functionality with a bold, eye-catching design, making it not only a tool watch with specific military pedigree but also a collector’s piece valued for its unique aesthetic and historical significance.
📦AVAILABLE FOR PICKUP
Want to see this watch in person? We are located in McLean Virginia off of Chain Bridge Road. We are by appointment only (no walk-ins), so please shoot us an email to schedule a time and get the address.
⚖TERMS
Watches to which a warranty will be provided will be indicated as such in the listing. No warranties are assumed unless explicitly stated in the listing. For watches that are covered under Warranty, the Warranty Period is from the Invoice Date. Warranty does not cover accidental, misuse/mishandling, water damage, and watches running fast or slow. Alterations or repairs by a third party will void the warranty. Warranty only applies to US transactions and to the original purchaser; it is non-transferable.
AUTHENTICITY GUARANTEED
All watches we sell are Guaranteed Authentic. We have a physical storefront in Mclean, Virginia, and all of our watches undergo a multi-point inspection to ensure Authenticity. All watches are Guaranteed Authentic or your Money Back.
HASSLE FREE RETURNS
This watch qualifies for our 3 day no questions asked return policy on all watches. There is no re-stocking fee as long as the watch is returned in it's original condition. All you'll be responsible for is shipping.
SHOWROOM in MCLEAN, VIRGINIA
Want to see this watch in person? We are located in Mclean Virginia off of Chain Bridge Road. We are by appointment only (no walk ins), so please shoot us an email to schedule a time and get the address.
FAST INSURED SHIPPING
We only use Fed Ex Priority Shipping and we always fully insure every package. We have shipped hundreds of watches over the years and have never had an issue with shipment! We try our best to ship the same day of order.
THE LITTLE DETAILS
WHY THIS WATCH
TERMS:
Watches to which a warranty will be provided will be indicated as such in the listing. No warranties are assumed unless explicitly stated in the listing. For watches that are covered under Warranty, Warranty Period is from Invoice Date. Warranty does not cover accidental, misuse/mishandling, water damage and watches running fast or slow. Alterations or repairs by a third party will void the warranty. Warranty only applies to US transactions. Warranty only applies to original purchaser and is non-transferrable.
THE BOTTOM LINE
This Zenith Skyline is 41mm, was purchased from an Authorized Dealer in 2023 and worn only a handful of times. The watch is Near Mint, and is complete with box and papers, and is under Zenith Factory Warranty. It comes with both the factory bracelet which has full links as well as the factory zenith rubber band with deployment buckle. This watch has a quick change strap system which allows you to change the bracelet without any tools.
AUTHENTICITY GUARANTEE
All of our watches are inspected by a qualified professional and are guaranteed to be Authentic. Every watch we sell goes through a Multi-Point Inspection to ensure the watch is Genuine. We are a brick and mortar storefront located in Virginia. Feel free to check out our reviews online via our website, on eBay, and Chrono24.
HASSLE FREE RETURNS
This watch qualifies for our 3 day no questions asked return policy on all watches. There is no re-stocking fee as long as the watch is returned in it's original condition. All you'll be responsible for is shipping.
FAST INSURED SHIPPING
We only use Fed Ex Priority Shipping and we always fully insure every package. We have shipped hundreds of watches over the years and have never had an issue with shipment! We try our best to ship the same day of order.
THE LITTLE DETAILS
WHY THIS WATCH
Available for Pickup in our Showroom in Mclean, Virginia
Want to see this watch in person? We are located in Mclean Virginia off of Chain Bridge Road. We are by appointment only (no walk ins), so please shoot us an email to schedule a time and get the address.
TERMS:
Watches to which a warranty will be provided will be indicated in the listing. For watches that are covered under Warranty, WearingTime LLC provides a one-year warranty from the invoice date, unless specified differently in the product listing or invoice. Any damage resulting from misuse or mishandling by the wearer, including but not limited to impacts, dents, crushing, or scratching, falls outside the warranty. Damage to the watch crystal, such as cracks or scratches, and water damage, is also excluded. This warranty does not cover watches that run slow or fast. The warranty becomes invalid if the watch undergoes alterations, repairs, or customizations without WearingTime LLC's prior written approval. Unauthorized interventions, changes, or meddling by technicians not sanctioned in writing by the Company will also nullify the warranty. This warranty doesn’t cover orders made by dealers or wholesalers. The one-year service warranty from WearingTime LLC is exclusively for customers based in the U.S. and is not applicable to international transactions. All sales made internationally are conclusive. Only the original purchaser can avail of this warranty; it cannot be transferred to another party
WHY THIS WATCH
The Zenith Chronomaster El Primero traces its roots to 1969 when Zenith introduced the El Primero, the world's first integrated automatic chronograph movement. Boasting high-frequency precision and a column-wheel mechanism, it has become iconic. The Chronomaster line showcases El Primero's horological legacy, featuring refined designs and innovative updates while preserving its heritage.
The Zenith Chronomaster El Primero 03.0240.4021, produced from the late 1990s to early 2000s, embodies the El Primero legacy of automatic chronograph excellence.
The Open Heart design in reference 03.0240.4021 features a cut-out on the dial, revealing the inner workings of the movement and allowing the wearer to admire the intricate mechanics. The 40mm stainless steel case houses the El Primero Caliber 4021, a self-winding movement with a 50-hour power reserve. The watch includes a chronograph function with a central seconds hand, a 30-minute counter at 3 o'clock, and a power reserve indicator between 5 and 7 o'clock. The dial is protected by a sapphire crystal, and the watch features a transparent case back, providing another view of the movement.
The Zenith Chronomaster El Primero 03.0240.4021 is powered by the legendary El Primero 4021 caliber, a high-frequency automatic chronograph movement. With 39 jewels, it beats at 36,000 vibrations per hour (5 Hz), enabling 1/10th of a second precision. The movement features a 50-hour power reserve and an intricate column-wheel mechanism, exemplifying Zenith's horological prowess.
On the wrist, I would say this watch wears true to its 40mm sizing. The bracelet on this watch is really comfortable and reminds me of the 90's style Omega Speedmaster bracelets, though the contrasting matte/brushed finishing on this one stands out more. I love the opening in the dial and find myself staring at it and not caring what time it is!
THE LITTLE DETAILS
This watch was purchased from Harrod's and comes with a box and papers including an outer box, an inner box, and a warranty card. The case is in fantastic condition, showing barely any wear, around 9/10. The bracelet shows some wear from normal use, but is in overall excellent condition, around 8/10. The bracelet will fit a 7.5-inch wrist. The movement is running strong with the chronograph resetting to zero. The watch is from 2003.
Available for Pickup in our Showroom in Mclean, Virginia
Want to see this watch in person? We are located in Mclean Virginia off of Chain Bridge Road. We are by appointment only (no walk ins), so please shoot us an email to schedule a time and get the address.
WHY THIS WATCH
Zenith celebrates the 50th Anniversary of the El Primero, one of the greatest chronograph movements ever made, with this special 18k Gold Revival of the original Gold El Primero Chronograph, the G381 released in the sixties. This watch has been released exclusively through horological media platform, HODINKEE. Only 50 examples were made and sold.
With this watch, Zenith attempted to make the revival as close to the original G381 as possible. Clocking in 38mm, it's true to the original diameter and gives the perfect fit for a revival. This watch has a Panda White Dial, and unlike it's steel counterpart, this watch has Non-Overlapping sub-registers, which was characteristics of the original gold chronograph. Also noteworthy is the acrylic crystal, which we always like on a vintage revival. This watch is powered by the legendary El Primero chronograph movement. On the backside the case is numbered xx/50, and engraved *1969-2019*.
On the wrist, this watch is effortless. Zenith hit this one right on the head, with a perfect diameter, and great vintage vibes. This watch takes well to a variety of different straps, but is partial to dark brown.
One last thing I'll mention is the Warranty. This watch comes with a staggering 50 year complimentary warranty from Zenith! Yes you read that right. The warranty will cover any manufacturing defects, as well normal wear and tear of components, and covers the cost of all servicing during this period.
THE LITTLE DETAILS Watch was purchased from in 2021 and with the full set of Box and Papers, including warranty card from Hodinkee. Watch was registered and comes with the FULL 50 YEAR WARRANTY from Zenith. Watch is Like New, and was only tried on a few times and left in the box. Watch is around 95-98% with only the most minor of wear from handling.
Available for Pickup in our Showroom in Mclean, Virginia
Want to see this watch in person? We are located in Mclean Virginia off of Chain Bridge Road. We are by appointment only (no walk ins), so please shoot us an email to schedule a time and get the address.
WHY THIS WATCH
Zenith was born 150 years ago, in Le Locle, a small town tucked away between the Neuchâtel mountains in Switzerland. Over the century and a half since it's founding, Zenith has produced countless innovations in watchmaking. It's most famous innovation was the El Primero movement, which was one of the first automatic chronograph movements. The El Primero is still considered one of the finest chronograph movements made.
This watch is loosely based on the Captain model, a top of the line dress watch first released in 1957. Early Pie-Pan Zenith Captains are truly beautiful pieces that are very sought after by vintage collectors.
This watch is powered by the aforementioned El Primero movement, a top of a line chronograph movement that is still my favorite automatic movement. My favorite thing about the El Primero is the feedback you get when engaging the pushers. It's this crisp feeling, which somehow evokes the feeling you get peeling the sticker off on an Apple product for the first time (Weird, I know!). For this particular model, the date wheel was moved to the 6 position, which I think feels way more in place than the traditional position at 4:30.
Honestly though, there are a ton of El Primeros out there, so I'll get into what makes this one stand out from the pack. In the flesh, the dial on this watch looks completely different than in the photographs. In the photos, the watch dial looks pretty flat and lifeless, but in real life, this dial feels warm and alive due to the Rose Gold indices and hands. The color on these indices is really something special and what makes this watch stand out, along with the fit which I'll get into in a minute. The sapphire crystal is slightly curved, accentuating the softness of the dial.
This watch is 42mm in diameter. I never considered this watch an option for me as I have smaller wrists, but it really does fit perfectly on my wrist, and thats due to a few things. First at 12.3mm, the watch is thin for a chronograph. Second, the case architecture, including the downward sloping lugs, and flat pushers was designed for a more comfortable, dressy fit. Finally, I think it was a smart decision to make this a 22mm lug width case, as I feel a beefier strap gives you more support, and somehow makes the watch feel smaller than it is. This is a chronograph devoid of any clunkiness whatsoever.
Value is something that is a consistent theme for Zenith watches. At $8,300 USD retail, you're getting a thin, elegantly shaped and balanced chronograph, with stunning dial and a top of the line in house chronograph that can easily be dressed up or down with the change of a strap. Speaking of straps, I'll also mention the strap on this watch is phenomenal. It's a gator strap with a rubber lining on the inside, so you don't have to worry about sweat stains ruining your gator.
THE LITTLE DETAILS
Watch is Like New - was purchased New in 2021 and was only tried on, but never worn. It comes with the Outer Box, Inner Box and Manuals. No warranty card. Comes on the original OEM Zenith Gator strap lined with Rubber on the inside, alongside a tang OEM zenith buckle.
Available for Pickup in our Showroom in Mclean, Virginia
Want to see this watch in person? We are located in Mclean Virginia off of Chain Bridge Road. We are by appointment only (no walk ins), so please shoot us an email to schedule a time and get the address.
WHY THIS WATCH
Don't let the futuristic design fool you, Zenith's Defy lineup actually started all the way back in 1969, when Zenith introduced a lineup of chunky, rugged watches, with futuristic designs. The Defy line of the 70's was the high-tech option of the time.
The Defy line is characterized by hard corners and angles, and this Defy Extreme Chronograph is no exception. Take a look at the pictures of the side of the case and you'll get a huge does of B2 bomber design. The case runs at 45mm in diameter and 15.5mm thick. And yet...it fits! This is due to the short lugs and full titanium case. On the rubber strap, this is the perfect summer watch. The tinted sapphire crystal gives you a view of the skeletonized Zenith Cal. 9004.
Let's get to the meat of this watch, which is the stunning and innovative El-Primero Calibre 9004, which shows elapsed time up to 1/100th of a second. The central chronograph hand moves around the dial lightening fast, and is really fun to watch. Zenith achieved this by adding a second gear train that vibrates at 360,000 vph.
Using this watch, you notice it's very interesting functionally. The movement actually has two separate power reserves, one for the time (50 Hours) and one for the chronograph (50 min). These two power reserves are wound separately. Counterclockwise for the hours/minutes and clockwise for the chronograph. The chronograph power reserve is displayed at 12. Since the chronograph runs for 50 minutes after winding, there is no hours elapsed sub-counter.
Finally let's talk value. This watch retails for $18,000. Compare this to other 100th of second chronographs like the Mont Blanc Timewalker (Retail $67,000), FP Journe (Retail $45,000), or the Tag Mikrograph (Retail $50,000). You're really getting a lot for the money here, not just movement wise, but also, the titanium bracelet, velcro strap, and rubber straps are a joy to use and behold, especially with Zenith's quick change strap system.
THE LITTLE DETAILS Watch is Brand New and comes with the Full set of box, papers, and warranty card. This watch was purchased in 2021 and is registered with Zenith, 3 YEAR WARRANTY. Watch comes with the Rubber Strap, Titanium Bracelet, and Velcro Strap. Watch is 45mm by 15mm.
Available for Pickup in our Showroom in Mclean, Virginia
Want to see this watch in person? We are located in Mclean Virginia off of Chain Bridge Road. We are by appointment only (no walk ins), so please shoot us an email to schedule a time and get the address.
WHY THIS WATCH
These watches were so common a few years ago, but are becoming increasingly rare. Best automatic chronograph movement in history. A touch of color on the dial and bezel. These is a future classic for sure.
THE LITTLE DETAILS
Watch is in overall excellent condition, with normal wear around the case. The watch was cleaned and oiled by our watchmaker. No bracelet, no box, no papers.
WHY THIS WATCH
Ask any chronograph enthusiast and they'll tell you the El-Primero is at the top of the heap. This one comes with a dazzling open-worked display, so you can see the escapement teeth engage with the balance wheel. Lots to offer here at this price point.
THE LITTLE DETAILS
This watch is Brand New. It comes with Box, USB, and Instruction Manual. No Warranty Card as it was misplaced by the owner.
Watch
| Brand | Zenith |
| Series | El Primero |
| Model No. | 03.2080.4021/01.c494 |
| Gender | Mens |
| Movement | Automatic |
Dial/Case/Bracelet
| Dial Color | Black |
| Case Material | Steel |
| Diameter | 42mm |
| Bezel | Steel |
| Clasp | Zenith OEM |
Condition
| Case | New |
| Dial/Crystal | New |
| Band/Bracelet | New |
| Movement | New |
| Box/Papers | Box and Papers, including USB, and Instruction Manual. Missing Warranty Card. |

