Nivaflex Unbreakable Mainspring N7182 for Mido 110, AS 933, 963 - Alloy

Nivaflex Unbreakable Mainspring N 7182 for Wittnauer 11 B/11 BG, C 11 BG, Mido 110, AS 933, 963 caliber movements plus perhaps similar ébauche watches, GR Ref. 4466, 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.