Waltham Factory Mainspring for 12s Colonial B Factory No. 2269 / 2237 - Alloy

Waltham Factory Mainspring for 12s Colonial B Movements, Factory No. 2269, alloy, new in envelope. This is the equivalent of a 2237 when in steel. See image for further details. 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 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.