Bulova factory Buloloy Insertopak mainspring for caliber 11AC - Alloy

Bulova factory Buloloy Insertopak mainspring for caliber 11AC, alloy, new in package. Note that the Buloloy plastic keeper is not perfect but the mainspring is. See images for further details. The wonderful thing about factory mainsprings is they always fit. 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.