Very nice very old piece. See pictures for measurements. The ruler is inches on one side and mm on the other side. Not sure if it works, works properly, or if all parts are there. I am sorry I am not an expert with these watches. I didn't want to wind up just because I didn't want to damage in anyway. Sorry for the lack of information. The tag that has a number on it is for my purpose only. Very nice. Needs cleaned and polished. Comes with scuffs scratches and surface wear. Please see pictures and you be the judge on details and conditions. Thanks