Dynaflex Mainspring for AS 984, 1158, 1187, 1194, Bulova 10BC, 10BS, 10BT - Alloy

Dynaflex Mainspring for A.S. 984, 1158, 1187, 1194, ETA 1280, Bulova 10BC, 10BS & 10BT, and Wittnauer 10E, 10S plus perhaps similar ébauche watches as well, alloy, new in envelope.  See images for further data and 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.