MAINSPRING 770/187

Compatible for Case Caliber: CITIZEN 0110, CITIZEN 0130, CITIZEN 0140, CITIZEN 0150, CITIZEN 0151, CITIZEN 2302, CITIZEN 2320, CITIZEN 5300, CITIZEN 5301, CITIZEN 5302, CITIZEN 5303, CITIZEN 5310, CITIZEN 5320, CITIZEN 5321, CITIZEN 5330A, and many more.

Factory No. 002-17

Part Name: MAINSPRING

The MAINSPRING 770/187 is a replacement internal watch part designed for watchmakers who rely on precision, durability, and efficiency. Only at Time Connection II, Inc. you gain instant access to a comprehensive database of high-quality watch components through our user-friendly BESFIT system. This database allows you to quickly search, identify, and locate the exact internal parts you need—saving time and ensuring accurate repairs every time.

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***Time Connection II Inc. is an independent part supplier of aftermarket watch parts. Time Connection II Inc. is not affiliated with or sponsored by any of the name brands above. Warranty may be voided by using generic aftermarket parts.***