ANON. AN 18 CARAT GOLD KEYLESS LEVER CHRONOGRAPH OPENFACE WATCH

细节
ANON. AN 18 CARAT GOLD KEYLESS LEVER CHRONOGRAPH OPENFACE WATCH
unsigned, circa 1940
With nickel finished jewelled lever movement, monometallic compensation balance, gold cuvette, the white enamel dial with Arabic numerals, outer calculating scales, two subsidiary dials indicating constant seconds and 30 minute register, in plain case, chronograph facility operated by a button in the crown, unsigned
50 mm. diam.