Marco Mainspring No.236 for 12s Waltham 21j #2224A - Steel

Marco (C&E Marshall) Mainspring No.236 for 12s Waltham 21j Model 1894, Factory No. 2224A, steel, hole end, new in envelope. See images for further details. 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.