Elgin Factory Mainspring for 12s No. 1720 - Steel

Elgin Factory Mainspring for 12s movements, Factory No. 1720, Steel, new in frail envelope. See image for further details. Of the 12s mainsprings made for Elgin this is the least common and thus harder to find. I may have several of these in different strengths and those that I can supply are shown in the drop-down list. Elgin mainsprings are typically coated in very sticky 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.