ROLLS RARE ATO.A RARE EXPERIMENTAL AUTOMATIC MEN'S NICKEL CHRONIUM WRISTWATCH. Model: AtoDate: Circa 1920'sCase reference: 627Movement: Signed, automatic (experimental using the movement of the full mechanism up and down inside the case to charge the mainspring before the invention of the oscillation weight), Hatot's Patents, 15-Jewels, Fab.SuisseDial: Signed, silvered, gilt Arabic numerals, black inner minute division, black and silver hands, sinsidiary dial for seconds at the 6 o'clock positionCase: Signed, polished nickel chronium, back engraved "Diberi Presen Oleh Beehive Brandy", No.106103Strap: Generic black leather, generic buckleSize: 26mm by 36.8mm Dimensions 26mm by 36.8mm.