U.S. Mainspring for NY Standard 16s #3196 - Steel

U.S. Mainspring for N.Y. Standard 16s movements, Factory No. 3196, HOLE end, steel, new in envelope. Make sure you need the HOLE (or Eye) end and not a T end. See images for further details. One of the most artistic envelope designs of any I've seen. 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.