Newall SUPER Security Mainspring #213 for Tissot caliber 43 & Unitas 245 thru 251 - Steel

Newall SUPER Security Mainspring #213 for Tissot caliber 43 & Unitas caliber 245 thru 251 movements and perhaps other wrist watches, 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.