Nivaflex Mainspring N1188 for Gruen 370, Elgin 865, Peseux 7000 - Alloy

Nivaflex Mainspring N 1188 for Gruen caliber 370, Elgin caliber 865 and Peseux 7000 movements (with variants) plus perhaps similar ébauche watches, white alloy. The Peseux was used in quite a number of other makers watches, most from the 1960's. 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 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.