Rezista Mainspring #143 for ETA caliber 761, 1201 - Steel

Rezista No. 143 steel mainspring ETA 761, 1201 caliber movements, and quite likely others as well. 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