Elgin Factory DuraPower Mainspring for 16s No. 6164 - Alloy

Elgin DuraPower Factory Mainspring for 16s 21j B. W. Raymond movements, Grades 571 thru 575 and Grade 616, Factory No. 6164, alloy, new in likely frail envelope. These came is several different strengths and those that I can supply can be found in the drop-down. Note that this mainspring is not similar to the 817. I likely have several of these in each strength so the one you get may differ slightly from the images. See images for further details. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item