Rezista Mainspring #323A for Benrus AN, AO & FF 150 movements - steel

Rezista No. 323A steel mainspring for Benrus AN, AO and FF 150 caliber movements, and quite likely many others, new in dirty envelope. 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