细节
A silver military open faced keyless lever chronograph pocket watch, Vacheron & Constantin, Geneve, for Corps of Engineers, U.S.A., circa 1920,
white enamel dial signed Vacheron & Constantin, Corps of Engineers U.S.A., luminous Arabic numerals, subsidiary seconds, outer seconds divided into fifths, luminous hands, 20-jewel frosted gilt movement with bimetallic compensation balance, micrometer adjustment to the regulator, numbered 385262, signed silver cuvette also inscribed Paul Ernst Frank, April 16-20-1923, Chicago Ill., polished case inscribed with a double headed eagle and Oriental Consistory, Chicago, Ill., diameter 51mm.
white enamel dial signed Vacheron & Constantin, Corps of Engineers U.S.A., luminous Arabic numerals, subsidiary seconds, outer seconds divided into fifths, luminous hands, 20-jewel frosted gilt movement with bimetallic compensation balance, micrometer adjustment to the regulator, numbered 385262, signed silver cuvette also inscribed Paul Ernst Frank, April 16-20-1923, Chicago Ill., polished case inscribed with a double headed eagle and Oriental Consistory, Chicago, Ill., diameter 51mm.