Rezista Mainspring No. 150A for Gruen 555, 585 & Bulova 6AB, 6AE, 6AF, etc - Steel

Rezista No. 150A steel mainspring for Gruen 555, 585 & Bulova 6AB, 6AE, 6AF, 6AQ, 6AR, 6F caliber movements and quite likely many others. See images for 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. plethora