Join Date: Dec 2014
Location: Black Forest, Germany
Here come the wanted pages. But far more interesting and not mentionned by you is the monogram on top of the barrel. It is to be red "JP" and probably stands for JOHANN PHILIPP von WALDERDORFF, bishop of the bishopric of Trier in the years between 1756 to 1768.
This date helps very much in identifying the gunmaker: The only G.Spangenberg under the reign of this bishop has been GOTTFRIED SPANGENBERG, working at Suhl between 1739 and 1780