Bulova factory Buloloy Insertopak mainspring for caliber 11ACC - Alloy

Bulova factory Buloloy Insertopak mainspring for caliber 11ACC, alloy, new in package. Note that the Buloloy plastic keeper may not be 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.