Marco Marshalloy Mainspring 3065M for Font 120, 123, 123-1, Benrus AI - Alloy

Marco Marshalloy Mainspring 3065M for Font 120, 123, 123-1, Benrus AI caliber movements, white alloy, new in envelope. See images for precise mainspring specifications. 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 a pretty good job of representing the item.