Zenith - El Primero - Chronomaster T Open - Power Reserve - Never Worn - Ref. No: 03.0240.4021 - Men - 2000-2010

Welcome to my Top Swiss Chronographs Boutique!

Zenith SA was started in 1865 by Georges Favre-Jacot at the age of 22, in Le Locle (canton of Neuchâtel), Switzerland.
In January 1969, Zenith announced imminent launch of first fully integrated, high-frequency, automatic chronograph movement "El Primero".
Today, Zenith wristwatches meet or exceed rigorous timekeeping C.O.S.C. standards, a reflection Zenith's history of innovative precision timekeeping.
Stylish and sophisticated, the offered iconic timepiece combines the traditional precision of the famed mechanical chronograph and a modern look of first-class materials. It is a gentlemen’s dress chronograph wristwatch that internally utilises one of the most highly regarded movements ever produced. Just look at this movement (through the transparent case-back): this is a true ode to watchmaking!

Movement:
- in-house chronograph automatic calibre 4021
- 39 jewels
- frequency: 36,000VpH (5 Hz)
- power reserve: 50 hours
- certified C.O.S.C. chronometer
- 248 parts
- silicon escape-wheel and lever
This amazing beautiful automatic movement can be observed endlessly, enjoy!
Case:
- 316L stainless steel
- polished
- 40mm excl. crown, 42,5mm incl.
- 9,5mm thick
- length: 46mm from lug to lug
- scratch-resistant sapphire crystal on both sides
Crown:
- 316L stainless steel
- polished
- pull/push with logo
- two polished chronograph pushers
Bezel:
- 316L stainless steel
- polished
- fixed
- multilayer
Dial:
- noble grey color
- polished hands
- black chic hour batons
- flyback function (reset without stopping)
- power reserve indicator at 06:00 o'clock
- “Open heart” display showing the escapement at 10:00 o'clock
- 30-minute counter chronograph sub-dial at 03:00 o'cloc
- minutes and seconds markers around the outer rim
Strap:
- brand new black leather, alligator grain on cow
- length: ca. 21cm incl. the wristwatch itself
- width: 20mm by lugs, 16mm by clasp
Clasp:
- 316L stainless steel
- double-folding "butterfly"
- polished
- with Zenith logo
Weight: 97 grams
Water resistant to 30meter/3ATM/100feet: OK for light splashes, rain, hand-washing; highly risky for showering or swimming
Full set, excellent color booklet (see pics).
Distributor's stock: as you can see, the original Zenith warranty card wasn't stamped.
For watches older than two years, “original warranty” means that the warranty card is included.
General professional pre-sale service was made in July 2026: the watch is keeping good time and working perfectly.
Excellent condition, never worn: the wristwatch comes from luxury watch-shop showcase. Leather straps often suffer from temperature in shop windows due to powerful spotlights, that's why the original Zenith strap was replaced with RIO'S high quality leather strap.
My personal authenticity and quality warranty: you will get warranty card (as pictured), fully completed, stamped and signed. My impeccable seller reputation speaks for itself: look at my feedbacks and sales ratings.
Insured, registered shipping worldwide with DHL Express: it’s not cheap, and yet fast and reliable, two days in Europe, three days for the rest of this world. Due to the company’s holiday season, purchased items will not be shipped between 1 and 12 September.

What you see in my pics is what you get. All photos were taken personally by me and correspond to the exact wrist watch you are placing your bid on.

My personal conclusion as a connoisseur and watch lover with over 30 years of experience: if you like visible mechanics + classic sizing, it’s a great value El Primero, especially thanks to the extremely rare grey dial.

NO EXTRA COSTS for EU Buyers!