Automatic mainspring 771 for OMEGA 1045 and LEMANIA 5100
Tension spring for automatic wrist watches
Suitable for the following calibers:
BULOVA: 11ALAC, 7BCAC,
CARTIER: 70BAC, 7BCAC, 7OBACD
ETA: 2447, 2550, 2550R, 2551, 2551R, 2580
MIDO: 0657, 737C, 747-OC
HAMILTON: 618, 693, 781, 791
ZODIAC: 47