Automatic mainspring 771 for OMEGA 1045 and LEMANIA 5100
Tension spring for automatic wrist watches
Suitable for the following calibers:
SEIKO: 6105A, 6105B, 6106A, 6106B-17JL, 6106B-25JL, 6106C, 6109A, 6117A, 6117B, 6118A, 6119A, 6119B, 6119C, 6306A, 6308A, 6309A, 6309B, 6319A