Marco Marshalloy Mainspring 4171M for Elgin 938, Waltham 853, Forster 189 - Alloy

Marco Marshalloy Mainspring 4171M for Elgin 938, Waltham 853, Forster 189, Kienzle 52, 52/10 caliber movements, white alloy, new in envelope. See images for precise mainspring specifications. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.