Elgin Factory Magistral Super Mainspring for 12s No. 6088 (2874) - Alloy

Elgin Factory Magistral Super Main Spring for 12s movements, Factory No. 6088, alloy, new in envelope. This is a functional equivalent of a steel 2874-.0075. See image for further details. Elgin mainsprings are typically coated in very old grease and must be 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 and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.