Comsco Mainspring #1233 for 16s Trenton / Waterbury / Ingersoll No. 2365 - Steel

Comsco Mainspring #1233 for 16s Ingersoll / Trenton / Waterbury Pocket Watch, Factory No. 2365, steel, 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.