Vigor HOOK End Clock Mainspring - 5/16" x .012" x 35" Long - CML 80.4

Vigor Clock Mainspring, HOOK End – 5/16″ Width, .012″ Strength/Thickness, 35″ Length, P/N CML 80.4, steel, new in open package. See images for further details. 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.