HR Nivastar Mainspring G429A for Wittnauer 11AW, Font 62, Benrus Y - Alloy

HR No. G429A Nivastar alloy mainspring for Font 62, Benrus Y, Unitas 190 & Wittnauer 11AW caliber movements, unsealed but new in distressed envelope. Mainsprings are NOS but the envelopes have clearly been handled quite a bit over the years. See images for all calibers supported and precise mainspring specifications. 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.