Swiss silver watch with double 12-hour numerals Circa 1823

Silver cylinder 24-hour pocket watch
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A very fine Swiss, extremely rare, a silver 24-hour pocket watch, circa 1823. With double 12-hour numerals for Heures du Jour and Heures du Soir. A polished case, hinged gilt metal cuvette. White enamel dial with Breguet hours from 1-12 twice for day and nighttime hours, outer minute track, subsidiary seconds. Blued steel Breguet hands.
A matte gilt movement, Lepine calibre, standing barrel, jewelled cylinder escapement, gold three-arm balance wheel, flat blued steel balance spring, polished steel endplate, index regulator. Dial signed, cuvette signed Avon Horloger A Apt.
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Diameter: 58 mm
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Signed: Joseph Avon Fecit  Geneva
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This watch is a very rare example of a 24-hour watch with numerals 1-12 in each half of the dial. The hour hand only makes one revolution every 24 hours instead of every 12 hours.