An unusual steel and gunmetal keyless wind open face chronograph pocket watch Chronographe de poche à cadran ouvert en acier et metal noirci remontoir au pendant Date: Circa 1920 Movement: Swiss lever, cut and compensated bi-metallic balance Dial: White Case: Round, No.1207 Size: 52mm For further information on this lot please visit Bonhams.com For further information about this lot please visit the lot listing