Comsco Mainspring #1188 for Hampden 6s Factory No. 8696 - Steel

Comsco Mainspring No.1188 for Hampden 6s movements, Factory No. 8696, steel, new in envelope. See image for precise mainspring specifications. 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.