Swartchild Black Shield SUPER Mainspring for AS 1250, Tudor 1250, Zodiac 1250 automatic - Alloy

Swartchild Black Shield SUPER Mainspring for AS 1250, Tudor 1250,  Zodiac 11A, Wittnauer 11AW, 11AWK automatic movements plus perhaps similar ébauche watches, white alloy with bridle, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. 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.