Omega Cal 503 parts for sale, some parts will fit 500 501 502 503 505 470 471 please do your homework or ask your watchmaker.
A3 set of screws as pictured.
A6 set of yellow hands Cal 503 from case ref: 2849-6-SC 34mm diameter case.
B4 & B5 case clamp with screw.
E6 complete barrel with mainspring.