Rezista Mainspring No. 134 for Bulova 5AD and Derby 67 - Steel

Rezista No. 134 steel mainspring for Bulova 5AD and Derby 67 movements, and quite likely many others, steel, new in 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