HR Superior Hole End Clock Mainspring - 35/64" x .012 x 53" Long - No. 80-643

HR Superior Clock Mainspring, Hole End – 35/64″ Width, .012 Strength/Thickness, 53″ Length, P/N 80-643, steel, new in box. 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