Welcome to my Top Wristwatches 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". 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! My personal note: this watch is not for 'cheapers' who are chasing today's fashion: this is a remarkable example of watchmaking art for real experts and connoisseurs! Movement: - famous in-house automatic caliber 4100 - column wheel chronograph - 31 jewels - power reserve: 55 hours - frequency: 36,000VpH (5Hz) - rhodium plated with fausses cotes embellishment - guilloche textured oscillator segment - straight-line lever escapement - shock absorber device - self-compensating free-sprung balance spring Case: - 316L stainless-steel, polished - 40mm excl. crown, 43mm incl. - 14,2mm thick - 47mm from lug to lug - scratch-resistant, anti-reflective domed sapphire crystal Crown: - 316L polished stainless steel - pull/push with logo Bezel: - multilayer - fixed - polished stainless-steel Case-back: sapphire, see-through Dial: - silver color - Clous de Paris in the inner circular sector - polished hands and Arabic numerals - moon phases window at 06:00 o'clock - minute markers around the outer rim - date aperture at 04:30 o'clock - central chronograph seconds hand - triple calendar - weekday and month at 12:00 o'clock - three chronograph sub-dials: 30-minute counter at 03:00 o'clock 12 hours at 06:00 o'clock small seconds at 09:00 o'clock Strap: - brand new black antiallergic leather, Bennett & Murray - length: ca. 22cm incl. wristwatch itself - width: 20mm by lugs, 16mm by clasp Zenith double folding "butterfly" with logo: - stainless steel, polished Weight: 99 grams Water-resistant 5ATM/50meters, not really useful for swimming and diving High recognition value. Distinctive design. Chic authentic Zenith watch box, warranty card and booklet (see pics). General professional pre-sale service was made in September 2023. Excellent condition, never worn: the wristwatch comes from luxury watch-shop showcase; that's why the strap is replaced with brand new one, leather straps often suffer from temperature in shop windows due to powerful spotlights. I began make pics with authentic Zenith strap (see close-up photos), but then I decided to replace the original strap: it was not perfect and I'm a perfectionist, a man of perfection ): My personal authenticity and quality warranty: you will get warranty card (as pictured), fully completed and signed on the back. Insured, registered shipping worldwide. Everything you see in my pics is included in the package that you'll receive. N. B. extremely rare and valuable piece of watch art with marvelous movement: lucky find for every true watch connoisseur! NO EXTRA COSTS for EU Buyers.