Nivaflex Mainspring 164G for Bulova 4AR, 4AU, 4AX, 5AK, AS 1017 - Alloy

bNivaflex Mainspring 164G for Bulova 4AR, 4AU, 4AC, 5AK and AS 1017 caliver movements plus perhaps other similar ébauche watches, 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.