Mystery marks: Phrygian Cap and a knight next to shield

I’m trying to identify the maker of some silver flatware. The only two marks are on the back of each piece: a square enclosing what appears to be a knight with his sword drawn, standing next to his shield, and what looks to me to be a Phrygian cap.


My apologies for the poor quality of the photo; my camera has difficulty capturing marks so small.