PM Merelloy Mainspring M225 for 12s Hamilton 1228 / 3028 / 718071 - Alloy

PM Merelloy Mainspring M225 for 12s Hamilton, Factory number 1228 / 3028 / 718071, DB-end, alloy, new in envelope. See images for 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 a pretty good job of representing the item.