BESTFIT Mainspring JA207 for 16s Hamilton No. 317 / 718041 - Alloy

BESTFIT Mainspring JA-207 for Hamilton 16s Movements, Factory No's 317 / 718041, T-end, alloy, new in envelope. See images for precise mainspring specifications. 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 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.