Newall Security Mainspring #313 for Longines 10/26, 11/87, 11/88 - Steel

Newall Security steel mainspring #313 for Longines 10/26, 11/87, 11/88 caliber movements and perhaps other wrist watches as well, 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.