Newall Security Mainspring #1234 for Buren caliber 56 & Gruen 210 thru 212 - Steel

Newall security steel mainspring #1234 for Buren caliber 56 and Gruen caliber 210, 211 & 212 movements and perhaps other wrist watches, 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.