Comsco Mainspring for 18s Trenton / Waterbury / Ingersoll early models #450 - Steel

Comsco Mainspring #1230 for 18s Ingersoll / Trenton / Waterbury early model Pocket Watch, Factory No. 450, steel, new in envelope. Mainspring T-end could be suitable for other 18s watches as well, including Rockford, Hampden and Seth Thomas. See images for characteristics. They're very nice looking mainsprings that have a funky curl to them - see the images. 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.