Comsco Mainspring #1030 for Waltham 6/0s movements No. 2226 - Steel

Comsco Mainspring #1030 for Waltham 6/0s movements, Factory No. 2226, steel, new in envelope. See images for precise mainspring specifications. I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.