Comsco Mainspring #1225 for N.Y. Standard 3/0s No. 1323 - Steel

Comsco Mainspring for 3/0s New York Standard, Factory No. 1323, steel, new in envelope. I specialize is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.