Swartchild Mainspring for 6s Hampden 7j to 15j Model Pocket Watch #8696 - Steel

Swartchild Black Shield Mainspring No.4350 for 6s Hampden 7 to 15 jewel model watches, factory number 8696, steel. Could also very well fit in other watches as well. Swartchild just wrapped these in really thin wax paper with no keepers so some have burst thru but all have been inspected. 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.