An 18K gold key wind open face pocket watch, London Hallmark for 1873 An 18K gold key wind open face pocket watch, Date: London Hallmark for 1873, Movement: English lever, No.5151, Dial: Gilt with foliate engraved centre, Case: Engine turned consular, No.5151, Size: 47mm, Accompaniments:, Sir John Bennett Ltd. fitted case, key