細節
BEGUELIN. A SILVER-CASED DOUBLE-DIAL WORLDTIME KEYLESS LEVER WATCH
signed J. L. & A. Beguelin, Tramelan, circa 1910
with nickel-finished movement, compensation balance, the white enamel dial with Roman and Arabic numerals, the revolving centre enamelled in colours with seventeen major world cities, grouped by time zones, the back dial indicating the difference in time to the nearest minute, plain case, dial signed - 51 mm diam.
signed J. L. & A. Beguelin, Tramelan, circa 1910
with nickel-finished movement, compensation balance, the white enamel dial with Roman and Arabic numerals, the revolving centre enamelled in colours with seventeen major world cities, grouped by time zones, the back dial indicating the difference in time to the nearest minute, plain case, dial signed - 51 mm diam.