HR Nivastar Mainspring G951 for Wittnauer 5JH, 5UN - Alloy

HR No. G951 Nivastar alloy mainspring for Wittnauer 5JH & 5 UN 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.