BESTFIT Mainspring JA702 for 18s Waltham Factory No. 2203 - Alloy

Bestfit Mainspring MS-JA702 for 18s Waltham New Model, Factory No. 2203, alloy, new in envelope. See image for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. 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.