Marco Marshalloy Mainspring 2757M for AS 922, 1280, 1287, MST 352, 371 - Alloy

Marco Marshalloy Mainspring 2757M for AS 922, 1280, 1287, MST 352, 371 caliber movements and perhaps others, white alloy, new in envelope. See images for precise mainspring specifications. I likely have several of these so the you get may differ slightly from the images. I specialize is 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.