HIS WATCH IS IN BEAUTIFUL CONDITION…BOTH COSMETICALLY AND FUNCTIONALLY….SERIAL NUMBER ON MOVEMENT BEGINS 139…….CASE BEGINS 691…IT MEASURES ABOUT 36MM SIDE TO SIDE…AND ABOUT 46MM STEM TO STERN (AS PICTURED) I CANNOT RECALL WHAT WALTHAM OFFICIALLY CALLED THIS SIZE …KINDA A LARGE LADIES OR SMALL MENS SIZE DUEBER WARRANTED 20 YEARS THE ONLY WEAR DETECTABLE IS WHERE A CHAIN ATTACHED TO THE HOOK…………NO GOLD LOSS DETECTABLE TO CASE FACE AND CRYSTAL ARE IN BEAUTIFUL CONDITION … HAPPY TO ANSWER ANY QUESTIONS THAT I CAN…. P.S. SOMEONE BEING HELPFUL HAS EMAIL ME AND INFORMED ME THAT IT IS A SIZE 0 AND DATES TO 1904