Vacheron & Constantin, a small gold coin watch retailed by Van Cleef & Arpels, circa 1925, 40 Lire coin dated 1810 with concealed release button in the band, opening to reveal a silvered dial with arabic numerals, signed Van Cleef & Arpels, moon hands, 18-jewel keyless lever movement with five adjustments signed Vacheron & Constantin, case numbered 10681, diameter 27mm.