Marco Mainspring #228 for Waltham 16s 23j Factory No. 2227 - Steel

Marco Mainspring No. 228 for Waltham 16s Model 1899 & 1908 23j movements, Factory No. 2227, steel, new in envelope. See images for further details. Please do note that is for 23j models, and while it might be just fine for a 21j, it is not strong enough for any ones lower than that. 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