Rezista Mainspring #164N for Bulova 5AN movements - Steel

Rezista steel mainspring No. 164N for Bulova 5AN caliber movements and likely other 5 ligne Bulova's as well, 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.