Ebauches SA Balance Staffs (3) for Unitas 13 ligne caliber 640 & variants - new

Ebauches SA Balance Staffs (728) for 10 ligne Unitas caliber 640 movements and variants, package of 3, new in package. See images for further details and supported caliber list.  I specialize is hard to find watch parts so I'll usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.