Alloy Mainspring for 6s Hampden #8696

Unmarked Maker Alloy Mainspring for 6s Hampden, Factory number 8696, new in envelope. Marked SA-312 which is the HR Alloy number is for this mainspring. 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.