Marco Marshalloy Mainspring 3028M for Rolex caliber 200, 210 - Alloy

Marco Marshalloy Mainspring 3028M for Rolex caliber 200, 210 and perhaps others as well, white alloy, new in envelope. See images for precise mainspring specifications. 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.