BESTFIT Mainspring 4513E for AS 1240, Unitas 190, Witt 11AW, etc - Alloy

BESTFIT Mainspring 4513E for A.S. 1240, Font 61, 62, Benrus Y, AB, Unitas 190 & Wittnauer 11AW plus perhaps similar ébauche watches, white alloy. See image 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.