Today's offering showcases this very cool Zenith Class El Primero with original bracelet. Its display back design showcases the beauty and precision that distinguish its legendary El Primero movement.

One of the finest automatic chronograph movements ever produced, when it was introduced in 1969, it became the world's fastest beating chronograph movement, beating at a speed of 36,000 vibrations per hour, and set a new standard against which other high-end, professional chronographs were judged, and continues to be produced today.

Here are some of the watch's features:

• "Iin house" caliber 400 movement - after almost forty years, the El Primero remains unmatched in its ability to measure short time intervals to one-tenth of a second
• High frequency 36,000 beats per hour balance system, twice the speed of many traditional chronographs and faster than any other chronograph in existence, insures exceptional accuracy
• Very legible and well executed matte black dial with large luminous markers and hands
• Full size 39mm case and substantial steel bracelet. We love the case bracelets feel - they feel very solid without yet aren't overly heavy on the wrist. The case is a nice size - it's full size yet looks and feels less bulky than many other automatic chronographs.

We are proud to offer it in gorgeous condition - about a 9.7 out of 10. On the wrist it presents as nearly like new with very slight signs of polishing. One section of wording on the case back is light, although still fully visible. Its El Primero movement is running strong and true and all the chronograph hands reset smoothly to a perfect zero very time.

Its accompanied by its original boxes. Included with the purchase is a one-year C.O.T. international warranty on the movement and its function, a custom printed Connoisseur of Time Certificate of Authenticity, and a new timing certificate attesting to its performance.

Zenith:
Since 1865, when Georges Favre-Jacot was first inspired by a dream of building a true watch ‘manufacture’, Zenith has been crafting exclusive watches made to exceptionally exacting standards. Having won over 1500 awards, the company enjoys a long, prestigious history and today enjoys a rapidly growing popularity among collectors.

• Manufacturer: Zenith
• Country of origin: Switzerland
• Model: Class El Primero, ref. 02.0500.400
• Serial no.: 126,259
• Case material: Stainless steel
• Dimensions:  39 mm. 44mm Long. Thickness 12.5 mm.
• Crystal: Sapphire, scratch-resistant, excellent condition
• Case: Stainless steel, two-body, solid, polished, stepped bezel and lugs, display case back with sapphire crystal
• Dial: Matte black with luminous radial Arabic numerals, subsidiary dials for the 30-minute and 12 hour registers, subsidiary seconds, outer tachometer graduation, original, mint condition
• Hands: Origina, luminous steel batons, excellent condition with the slightest bit of aging visible - nearly requires magnification to see
• Movement Type: El Primero Cal. 400, rhodium-plated, oeil-de-perdrix decoration, 31 jewels, straight line lever escapement, monometallic balance, shock absorber, self-compensating flat balance-spring, steel rotor
• Band: Original, signed Zenith, stainless steel, comfortable and substantial without being overly heavy, fits a wrist up to approx. 7.8 inches (currently sized to fit a wrist of approx. 7.25 inches with two uninstalled links - please let us know if you would like them installed), adjustable, presents as mint on the wrist with very slight wear to the underside
• Warranty: 1-year international warranty. Please email concierge@cotwatches.com for details.
• Timing: Timed to precision on a state-of-the-art computerized system. Your watch is important to us, and we will take care of it for its lifetime. We provide the best after sale care in the business with an experienced team of watchmakers both of whom each have over forty years of experience and a large number of parts.
• Box/Papers: BOX - Original Zenith boxes; PAPERS - Custom printed Connoisseur of Time Certificate of Authenticity; New timing certificate
• Returns: 7 days full refund. 100% satisfaction guarantee

We offer a 100% satisfaction guarantee for all of our watches. If you are in any way unsatisfied with the watch we will fully refund the purchase price anytime within 7 days after the watch has been received. Our goal is to exceed our client's expectations throughout the buying experience.

All watches are packaged carefully and mailed double boxed in specially constructed, reinforced shipping boxes designed for high value items. All watches are sent fully insured with signature required. Most of our domestic shipping is done through FedEx. At times we will also use USPS Express Mail, and we can accommodate most requests for your preferred carrier. International shipments are sent USPS International Express Mail or FedEx.

The purchase price will be the declared value of the merchandise on any required customs forms. The payment of all customs duties, tariffs, and taxes are the responsibility of the buyer.

Also note that water resistance of vintage watches can no longer be guaranteed and is not covered under the watch's warranty. We do not recommend getting a vintage watch wet, even one that was originally designed to be waterproof.

To get an idea of how this watch will look on the wrist, please use the Watch Sizing Guide