Elgin Factory Mainspring for 12s No. 2874 - Steel

Elgin Factory Mainspring for 12s movements, Factory No. 2874, steel, new in a possibly very frail envelope. See images for further details. These were available in a couple of different strengths and you should be able to select the one you need from the drop-down list. I likely have several of these so the envelope may differ slightly in appearance from what is shown. Elgin mainsprings are typically coated in very old grease and must be cleaned before use. I specialize in 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.