WATCH-CRAFT Mainspring 2875W for Seiko Unique, DSS - Alloy

WATCH-CRAFT Mainspring 2875W for Seiko Unique, DSS watches and perhaps others as well, white alloy, new in envelope. See image for precise mainspring specifications. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.