Vigor HOLE End Clock Mainspring - 5/16" x .010" x 74½" Long - CMH 80.11

Vigor Clock Mainspring, HOLE End – 5/16″ Width, .010″ Strength/Thickness, 74½″ Length, P/N CMH 80.11, steel, new in dirty envelope. See images for further details and specifications in mm. This is a REALLY LONG mainspring, probably for a 8-day clock, perhaps even longer. I  likely have several of these so the one you get may differ slightly from the images. I specialize in hard to find watch & clock parts and all parts are unconditionally guaranteed. Images do a pretty good job of representing the item.