BESTFIT Mainspring 610M for Benrus BA, BB & MST 365, 368 - Alloy

BESTFIT Mainspring 610M for Benrus BA, BB and MST 365, 368 plus perhaps similar ébauche watches, white alloy. See image for precise characteristics. 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 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.