BESTFIT Mainspring JA306 for 16s Hampden Factory No. 3696 - Alloy

BESTFIT Mainspring MS-JA306 for Hampden 16s movements, Factory No. 3696, T End, alloy, new in envelope. See images for further details. I likely have several of these so the one you get may differ slightly from the images. 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.