Marco Mainspring #3191 for Bulova 5AB, 5AL, 5AX, 5AC, AS 976, 1012, 1127, Mido 500, 500A - Steel

Marco Mainspring No. 3191 for Bulova 5AB, 5AL, 5AX, 5AC, AS 976, 1012, 1127, Mido 500, 500A, Benrus AE caliber movements and perhaps 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.