Sandsteel Mainspring #4270 for Rolex 8¾ ligne A.R. Automatic w/ brake - Steel

Sandsteel Mainspring #4270 for Rolex 8¾ ligne A.R. automatic with brake, 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.