Posts 29,885 Likes 77,295 Archer ·Feb 26, 2020·Omega Qualified Watchmaker Just FYI - to broaden your search, the balance used in the 503 is also used in the 490, 491, 500, 501, 502, 504, and 505.
Posts 5,613 Likes 6,384 CanberraOmega ·Feb 26, 2020 Archer Just FYI - to broaden your search, the balance used in the 503 is also used in the 490, 491, 500, 501, 502, 504, and 505. Thanks
Posts 18,162 Likes 37,904 JimInOz ·Feb 26, 2020·Melbourne Australia Part numbers from original parts list, later ones may be longer. (ignore 1324, 1326 should get you out of trouble) Or if your watchmaker just wants a balance staff.