Borel Material Balance Staff for BFG caliber 844 - New

Borel Material Balance Staff for 10½ ligne Baumgartner caliber 844, new in package. This is a Swiss cylinder escapement stadf, with finger, part number 795.  See images for further details however, there is only one in the package. I specialize in hard to find parts and are sold with an unconditional guarantee.  Images do an pretty good job of representing the item.