HR Mainspring SA767 for 22s 8-day Waltham No. 2245 / 2275 - Alloy

HR Mainspring SA 767 for 22s Waltham 8 Day, Factory No. 2245 / 2275, alloy, new in frail envelope. See images for precise mainspring specifications. Used in many different applications, including car clocks, aircraft clocks, travel clocks, deck clocks, ships clocks, and really big pocket watches. I likely have several of these so the one you get may differ slightly from the images. Images do a pretty good job of representing the item.