Swiss gold minute repeating lever pocket watch Circa 1920

Gold open faced by Vacheron & Constantin
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A fine yellow gold open faced minute repeating keyless lever watch, circa 1920. Manual winding nickel lever movement, 20 jewels, cut bimetallic compensation balance, minute repeating striking on the gong with two polished steel hammers, 18k yellow gold cuvette, yellow dial with textured centerfield, painted Arabic numerals, Breguet hands, subsidiary seconds, outer minute track, 18k yellow gold case, repeating slide to the band, dial signed, case, cuvette and movement signed and numbered.
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Diameter: 47 mm
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Signed: Vacheron & Constantin Geneve