Rare Swiss complicated platinum keyless lever watch Circa 1920

Platinum open faced dress watch
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A very fine and rare, elegant Swiss platinum and gold open faced minute repeating keyless dress watch with perpetual calendar and moon phases made by Haas Neveux
in Geneva, circa 1920. The rhodium plated movement, stamped twice with the seal of the Geneva quality mark, with Geneva striping decoration, 29 jewels, a straight line lever escapement, cut bimetallic compensation balance, blued steel flat balance spring and an index regulator, repeating on gongs activated by a slide on the band. Matte silver dial with black champlevé Arabic hour numerals, an outer minute track, subsidiary seconds with concentric phases of the moon at 6 o’clock, days of the week at 9, the date at 6, months of the year with four year indication at 12 and original blued steel Breguet hands. The polished case features a brushed back with an inlaid gold concentric monogram and correctors in the band. Dial signed, case and movement numbered.
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Diameter: 47 mm
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Signed: Haas Neveux & Cie Genève
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Haas Neveux, founded in 1848 by Benjamin Haas, later known as Haas Neveux & Cie, is one of the oldest Swiss watch manufacturers. The Haas signature has always been one of the most sought after, thanks to the impeccable standards of the company. Among their most notable creations was the first ultra thin watch, launched at the end of the 19th century.
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Haas gained a reputation as a manufacturer of fine chronometers, chronographs and highly complicated watches. Pieces with minute repeating and a perpetual calendar are rarely found with a platinum case.
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The present watch is of very high quality as would be expected from Haas Neveux. The movement bears the Geneva Seal, confirming that it gained chronometer accreditation. The elegant appearance of this timepiece is very similar to that of examples also made by Audemars Piguet in the same period.