- OMEGA original part, not in factory packaging.
- Fits cal: 470, 471, 490, 491, 501, 503, 504, 505, 520
Fits case ref: / cal: Crystal no:
- 2828 471 4
- 2832 471 6
- 2846 501 6
- 2848 491 6
- 2849 503 6
- 2852 501 6
- 2853 501, 505 6
- 2862 491 6
- 2864 501 6
- 2865 501 6
- 2866 501 6
- 2869 501 6
- 2875 501 6
- 2879 491 6
- 2880 501 6
- 2887 501, 505 6
- 2888 491 6
- 2889 501 6
- 2909 501 6
- 2916 471 7
- 2921 501, 505 6
- 2922 503 6
- 2924 501 6
- 2930 501, 505 6
- 2943 503, 504 6
- 2954 501, 504 6
- 2971 520 6
- 2972 471 -
- 2975 501 14
- 2984 501 6
- 2988 504 6
- 2989 505 6
- 2997 501 6
- 14363 501 6
- 14365 501 6
- 14368 501 6
- 14397 504 6
- 14710 501 14
- 14729 501 6
- 14744 503 14
- 14746 503 6
- 14747 504 6
- 14767 491 6
- 16920 501 -
- 16995 504 -
- 19010 501 6
- 19021 501 6
- 19013 471 6
- 19037 504 6
- 19040 501 6
- 19045 503 6
- 19046 503 6
- 19047 504 6
- 19048 504 6
- 19051 504 6
- 19053 505 6
- 470: 17 jewels (1955).
- 471: 19/20 jewels (1955).
Versions: 28.00 mm.
- 490: 17 jewels, sub second (1956).
- 491: 19 jewels, sub second (1956).
- 500: 17 jewels, center second (1956).
- 501: 20 jewels, center second (1956).
- 502: 17 jewels, center second, date (1956).
- 503: 19/20 jewels, center second, date (1956).
- 504: 24 jewels, center second, date, chronometer (1957).
- 505: 24 jewels, center second, chronometer (1957).