Alloy Mainspring for Vulcain caliber 112 & 140 to 143

Unmarked Swiss Mainspring for Vulcain (VUL) caliber 112, 140, 141, 142, 143 movements plus perhaps similar ébauche watches, white 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.