Jurgensen Mainspring #723 for 16s Howard Pocket Watch No. 329 - Steel

Jurgensen Mainspring #723 for 16s Howard Movements, Factory No. 329, steel, new in envelope. Could also fit in other watches as well. See images for precise mainspring specifications. I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.