Rezista Mainspring No. 202 for Gruen caliber 480 & MST caliber 297 - Steel

Rezista No. 202 steel mainspring for Gruen caliber 480 & MST caliber 297 and quite likely others. See images for precise mainspring specifications. I specialize is 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.