Comsco Mainspring #1052 for Waltham 8-Day Factory No. 2232 - Steel

Comsco Mainspring #1052 for Waltham 37s 8-Day Movements, Factory No. 2232, steel, new in frail envelope. Distributed by Burton M. Reid and Sons. See images for precise mainspring specifications and 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 and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.