BESTFIT Mainspring 713C for A.S. 1001, 1023, 1030, Wittnauer 6N7 - Alloy

BESTFIT Mainspring 713C for AS 1001-1023-1030 caliber movements plus a couple of Wittnauer calibers and perhaps similar ébauche watches, white alloy, new in envelope. See images for precise characteristics. 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.