Marco Marshalloy Mainspring 2763M for Buren caliber 410 movements - Alloy

Marco Marshalloy Mainspring 2763M for Buren caliber 410 movements, and perhaps others, alloy, new in envelope. See images for precise mainspring specifications. 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.