120. GSW. A stainless steel keyless wind open face chronograph pocket watch GSW. Chronographe de poche à cadran ouvert en acier remontoir au pendant Date: Circa 1920 Movement: Nickel full plate, Swiss lever, cut and compensated bi-metallic balance wheel Dial: Champagne, black Arabic numerals, black outer 1/5th second divisions, subsidiary dials at 6 and 12 for running seconds and 30 minute recording, blued steel Breguet style hands Case: Polished round, snap on back Signed: Dial Size: 49mm