BESTFIT Open Loop Mainspring for American Clocks No. 7.15mm x .28mm - L715-3

Bestfit System #77 Mainspring for Ameican Clocks, Open Loop end, No. L175-3, 1950’s or newer, steel. See image for precise mainspring specifications. I specialize is hard to find watch & clock parts and all parts are unconditionally guaranteed. Images do a pretty good job of representing the item