Joseph Bovy was not active for a very long time. He did hold multiple patents, more than the 6 that Alain mentions on LittleGun. Exactly how he improved the Lefaucheux patent is not clear. There were others (about 5) in his family who were also involved in the gun trade.
The Lefaucheux, a French gun maker known for his pin fire pistols, closing mechanism was a novel approach. It stayed around for a much longer time than some of the other attempts.
This gun was proofed in Belgium, only for black powder. There seem to be some interesting markings. Perhaps from the barrel makers. From the patent, the gun was produced some time on after 1870. It was not uncommon for German dealers to purchase guns and the sell them as their own. It was a common practice just about everywhere.
Pete