Bulova factory Buloloy Insertopak mainspring for caliber 11AF - Alloy

Bulova factory Buloloy Insertopak mainspring for caliber 11AF, 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 likely have several of these so the one you get may differ slightly from the images. 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.