Omega Cal 503 balance or complete movement

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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.
 
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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
 
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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.