Marco Mainspring 283P for 6/0s Waltham No. 2226 / 2276 - Alloy

Marco Mainspring 283P for 6/0s Waltham Model 1898 and Model 1942 ('42) Military Movements, Factory number 2266 / 2276, alloy, hole end, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly 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.