Rare Swiss gold split seconds chronograph with register Circa 1941

Rose gold lever with tachometer scale
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An extremely fine and rare Swiss, 18 carat rose gold keyless pocket watch with split seconds chronograph and 30 minute register, circa 1941. Sold in April 1942. A polished case, buttons at 11 and 1 for the chronograph functions. Rose gold dial with applied rose gold Arabic and baton indexes, inner track for a minute and fifths of a second division, outer tachometer scale, subsidiary dial for the seconds and 30 minute register. Rose gold feuille hands, rhodium plated movement, gold wheel train, 23 jewels, eight adjustments, lever escapement, monometallic compensation balance with gold temperature screws, blued steel Breguet balance spring. Dial, case, and movement signed.
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Diameter: 46 mm
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Signed: Patek Philippe & Cie.  Genève
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Accompanied by the Extract from the Archives
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REF. 685 was introduced in the late 1930s and utilized the same 13 movements as the reference 130. The present watch, accompanied by an Extract from the Archives confirming its sale on August 22, 1945, is a very fine example of reference 685. The watch shows very little polishing and the movement is very clean. The original dial shows minor imperfections, however, it exhibits a strong signature and details, offering an attractive, well preserved example of this model.