HR Mainspring No. 498 for Benrus Q, AS 976 - 1025 and a bunch of Bulova - Steel

HR No. 498 steel mainspring for Benrus Q, AS 976, 969, 1012 & 1025, Bulova 5AB, 5AC, 5AL, 5AX, 6AL caliber movements, new in envelope. See images for precise calibers supported and mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. 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.