細節
A silver military open faced keyless lever chronograph pocket watch, Vacheron & Constantin, Geneve, for Corps of Engineers, U.S.A., circa 1917,
white enamel dial signed Vacheron & Constantin, Corps of Engineers U.S.A., Arabic numerals, subsidiary seconds, outer seconds divided into fifths, luminous hands, frosted gilt 20-jewel movement with bimetallic compensation balance, micrometer adjustment to the regulator, numbered 384180, silver cuvette, polished case inscribed Corps of Engineers U.S.A., No.2309, chronograph button in the crown, dial, movement, cuvette and case signed, diameter 51mm.
See Colour Illustration (Plate 3)
white enamel dial signed Vacheron & Constantin, Corps of Engineers U.S.A., Arabic numerals, subsidiary seconds, outer seconds divided into fifths, luminous hands, frosted gilt 20-jewel movement with bimetallic compensation balance, micrometer adjustment to the regulator, numbered 384180, silver cuvette, polished case inscribed Corps of Engineers U.S.A., No.2309, chronograph button in the crown, dial, movement, cuvette and case signed, diameter 51mm.
See Colour Illustration (Plate 3)