Vigor TONGUE End Clock Mainspring - 19 x 6½ x 23½" Long - T 280-1

Vigor Clock Mainspring, TONGUE End – Dennison 19 x 6½ x 23½" in Length, P/N T 280-1, steel, new in open chewed-up envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images.  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.