Rare Swiss steel, gold hexagonal bi-colour dress watch Circa 1964

Bi-colour gold/steel pocket watch by Rolex
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An exceptionally rare and fascinating hexagonal Swiss dress watch with a bi-colour design and a Class A observatory movement, circa 1964. The watch has a hexagonal steel, red 9K gold polished case with pushback Ref. 1645 and an engraved Rolex crown. The silvered dial displays a dual-marking Swiss Made / Fab. Suisse, radial time indication in the upper half with an outer minute track, and subsidiary seconds in the lower half. The bridge movement has a decentralized minute wheel, a Rolex patent-protecting escapement cap, Breveté Francais SGDG, ULTRA PRIMA quality, and a monometallic balance.
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Dimensions: 37 x 41 mm
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Weight: 35 g
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Signed: Rolex Prince Imperial
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Considered the highest-quality watch of its time, the Prince Imperial boasted a phenomenal observatory-grade movement.
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Rolex is a luxury watch brand that was founded in 1905 by Hans Wilsdorf and Alfred Davis in London, England. Originally called Wilsdorf & Davis, the company later changed its name to Rolex in 1908. Rolex has a rich history of innovation and achievement in the watchmaking industry. In 1910, it was the first watch company to receive the Swiss Certificate of Chronometric Precision, which is awarded to timepieces that pass a series of rigorous tests for accuracy and reliability. In 1926, Rolex introduced the Oyster, the world’s first waterproof wristwatch. This was followed by the introduction of the Perpetual rotor, which automatically winds the watch’s mainspring as the wearer moves their wrist. Over the years, Rolex has continued to innovate and push the boundaries of watchmaking technology. Today, Rolex is one of the most recognized and respected luxury watch brands in the world, known for its precision, durability and timeless style.