Elgin Factory Mainspring for 18s Factory No. 1956 - Steel

Elgin factory mainspring, Factory No. 1956 for 18s movements, Hole & Single Brace (S. Hook), steel, new in exceedingly frail or very discolored envelope. See image for precise characteristics. Elgin mainsprings are typically coated in very old grease and must be thoroughly cleaned before use. I likely have several of these so the one you get may differ slightly from the images. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.