Waltham Factory Mainspring for 12s Colonial B 1924 No. 2237 - Steel

Waltham Factory Mainspring for 12s Colonial B 1924 Movements, # 2237, steel, new in likely frail envelope. These are available in several strengths and the ones I can supply are shown in the drop-down list. See image for further details. I likely have several of these in each strength so the one you get may differ slightly from the images. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed.Images do a pretty good job of representing the item.