Marco Mainspring #283 for Waltham 6/0s Jewel & 1942 Series No. 2226 - Steel

Marco Mainspring No. 283 for Waltham 6/0s Model 1898 "Jewel Series" movements and the 1942 Military wrist watch movements, Factory No. 2226, steel, new in envelope. See images for precise mainspring specifications. These are grade names for the better of the 6/0 size movements: Diamond, Riverside, Ruby and Sapphire - hence the name "Jewel Series." See images for further details. 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.