Found him in another book as well. In Carl-Wilhelm Clasen, "Rheinische Silbermarken" , page 213 "nr. 923. Meister ER. Veilleicht Eberhart Raiben, Bueger 1689." The master mark (925/929) looks very much alike. The town mark (928) for 1763-1769 and the warden mark (931) for 1763-1769 look very much the same as well.
The fact that the period of the town + warden marks differ from the period master ER worked puzzels me. And the form of the knife doesn't look as made earlier than 19e century.
Regards,
Zilverik


