Rezista Mainspring No. 123 for Gruen caliber 115, 117, 119, 123 - Steel

Rezista No. 123 mainspring for Gruen caliber 115, 117, 119, ,123 movements, and quite likely many others, steel, 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 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.