Welcome to my Top Swiss Chronographs Boutique: Breitling S.A. was founded in 1884 by Léon Breitling. It's known for precision-made chronometers designed for aviators. The first Chronomat had a circular slide rule and its design followed the tension of the era for military watches. The movement of the first Chronomat was the Venus 175 with 17 jewels, a manual wind movement. The Chronomat was a patented design introduced in 1940 by Willy Breitling and the world's first two-pusher chronograph wristwatch. The first model of the Chronomat collection had a circular slide rule and its design followed the appeal and design cues of the era for military watches. In the 1940s, Breitling added a circular slide rule to the bezel of its Chronomat models. This bezel became most associated with the Navitimer, launched in 1954. Chronomat is a trademark and collection line first released in 1942 and is one of the company's best-selling models. As the leader of the Breitling Collection, the Chronomat rapidly asserted itself as the reference in the specialized field of mechanical chronographs. Originally created to equip the famous Frecce Tricolori flight team, the Chronomat has constantly evolved over the years, both technically and aesthetically. The offered version of the Chronomat is undoubtedly the most accomplished, with its generous, sophisticated lines resulting from a subtle alchemist's blend of proportions and curves. The chronograph complication in the Breitling B01 is a column wheel style. With its vertical coupling system, the chronograph hand returns to reset position with a smooth and precise motion without undesirable jumpiness observed on other chronograph systems. The chronograph complication in the Breitling B01 is a column wheel style. With its vertical coupling system, the chronograph hand returns to reset position with a smooth and precise motion without undesirable jumpiness observed on other chronograph systems. Movement: - in-house self-winding B01 calibre - certified Swiss chronometer C.O.S.C. (see pics attached) - column wheel chronograph - power reserve 70 hours - 47 jewels - frequency: 28.800 vph, 4Hz Case: - 750 pink gold/stainless steel, polished - 44mm excl. crown, 48mm incl. - thickness: 17mm Anti-reflective sapphire crystal Bezel: - stainless steel/solid 750 pink gold - diver's 0 - 60 - unidirectional turning Crown: - 750 pink gold - pull/push - screw-locked - special chic "Chronomat" shape - two 750 yellow gold pushers Case-back: - solid stainless-steel with engravings Dial: - dark-blue with three golden chronograph sub-dials - golden polished logo and hour batons - golden polished luminous hands and hour markers - minutes and seconds markers at outer rim - golden Breitling logo at 12:00 o'clock - date window at 04:30 o'clock - three chronograph sub-dials: 30 min. counter at 03:00 o'clock 12 hours at 06:00 o'clock small seconds at 09:00 o'clock Strap: - brand new genuine black leather with chic white stitches - length: ca. 22cm incl. wristwatch itself - width: 22mm by lugs, 20mm by clasp Pin buckle: - polished stainless steel with logo Free gift: Breitling rubber strap. My personal opinion, based on 30+ years of collecting experience: I don't think it's right to swim in a watch with a leather strap, so I add my free gift: Breitling rubber strap for swimmers. Weight: 142 grams (with leather strap) Water-resistant: 500meter/50ATM/1650feet High recognition value. Distinctive design. General professional pre-sale service was made in July 2024: 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 strap is replaced with brand-new one. Full set, see pics. My personal authenticity and quality warranty: you will get warranty card (as pictured), fully completed and signed on the back. 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. Everything you see in my pics is included in the package that you'll receive. NO EXTRA COSTS for EU Buyers!