Rezista Mainspring #243 for Bulova 10A, Fleurier 330, MST 352, 364, 371 movements - Steel

Rezista Mainspring No. 243 for Bulova 10A, Fleurier 330, MST 352, 364, 371 caliber movements and likely others as well, 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.