It is a Lefaucheux type action with an early breechloader type trigger-guard bow. I would say that F. Ansorg sourced his cousins in the Suhl, Zella Sankt Blasii and Mehlis area where there were and still are very capable mechanics. It appears there is a tube knitter's mark just forward of the left flat. There may be another mark on the standing breech or if you every remove the locks, additional marks may be found there.

Kind Regards,

Raimey
rse