PM Mainspring for Bulova 6A, 6W, Gruen 101 - ONYX Steel

PM Mainspring for Bulova caliber 6A, 6W and Gruen 101 caliber movements and quite likely others, ONYX 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.