An unusual silver keyless wind open face split second chronograph pocket watch Chronographe de poche à cadran ouvert et fonction rattrapante en argent (800) remontoir au pendant Date: Circa 1900 Movement: Swiss lever, cut and compensated bi-metallic balance, column wheel chronograph Dial: White Case: Hinged round, No.23390 Size: 54mm Weight: 126,21g For further information on this lot please visit Bonhams.com For further information about this lot please visit the lot listing