The MAINSPRING (WHITE-A-LOY) 159R is the replacement internal parts for watchmakers who demand precision and efficiency. At Time Connection II, Inc., you have immediate access to an extensive database of internal parts through the intuitive BESFIT system, allowing you to locate exact components with minimal effort. The streamlined search functionality eliminates guesswork, connecting you directly to the parts you need for repairs, restoration, and maintenance work. Whether you're servicing a vintage timepiece or completing a restoration project, access the exact parts you need through our Best Fit System—browse our comprehensive inventory anytime, anywhere. Time Connection II, Inc. delivers the quality and reliability professional watchmakers demand.
Compatible for Case Caliber: SEIKO 11LN LINER, SEIKO 3140, SEIKO 402, SEIKO 6220B, SEIKO 6220C, SEIKO 6220D, SEIKO 6220M, SEIKO 6222A-6222B, SEIKO 6222C, SEIKO 6222M, SEIKO 956, SEIKO SKYLINER, and many more.
Factory No.
Part Name: MAINSPRING (WHITE-A-LOY)
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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.***


