What a superb rare timepiece !! The 1926 Lady Waltham L-10 15J movement has date serial number 25541816. It has been converted to a mens watch in a solid 18k gold case, case back stamped 18K. The overall weight is a hefty 24.1 grams & measures 25.5mm wide ex crown, lug to lug is 39mm, lug width 19mm. Note the the lugs are articulated and move up and down. The bezel featuring 18k yellow gold numerals is possibly missing its enamel fill, dial has an aged appearance. The watch is currently not working, movement is fully wound, will need either a service or repair.