Newall Security Mainspring #623 for Hamilton 6/0s Factory No. 2321 - Steel

Newall Security Mainspring #623 for Hamilton 6/0s, Factory No. 2321, steel, new in envelope. See images for further details and precise mainspring specifications. I likely have several of these so the one you get may differ slight from 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