BOREL Mainspring SA305 for 16s Hampden No. 2696 - Alloy

BOREL Mainspring SA305 for Hampden 16s Movements, Factory No. 2696, T end, alloy, new in envelope. See images 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.