BESTFIT Mainspring 710H for Peseux 40, Westfield 10AZ, 10WZ, 10ZC - Alloy

BESTFIT Mainspring 710H for Peseux caliber 40, Gruen caliber 140 - 141 as well as Westfield caliber 10AZ, 10WZ & 10ZC plus perhaps similar ébauche watches, white alloy, new in dirty 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 is 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.