BESTFIT Mainspring 112E for Bettlach 746, Court 519, Frenca 62A + many others - Alloy

BESTFIT mainspring 112E for a plethora of Swiss wrist watch movements, including the following; 

Mainspring is 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 is hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.