PM Merelloy Mainspring M13 for Hamilton grade 750, 751 - Alloy

PM Merelloy Mainspring M13 for Hamilton grade 750, 751 bracelet movements perhaps similar ébauche watches, white alloy, new in envelope. See image for precise mainspring specifications. I likely have several of these so the one you get may differ from the images. I specialize in 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.