Vigor HOLE End Clock Mainspring - 5/16" x .010" x 39½" Long - CMH 80.8

Vigor Clock Mainspring, HOLE End – 5/16″ Width, .010″ Strength/Thickness, 39½″ Length, P/N CMH 80.8, steel, new in envelope. See images for further details and specifications in mm. 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.