To me the maker's mark appears to be
*P* in hexagon for; Johannes Leonardus van der
Pauw Jr., registered in Schoonhoven, 1907-1936
He was born in Schoonhoven 18-01-1856 and died in Schoonhoven on 24-04-1942, his father Johannes Leonardus van der Pauw Sr. was a silversmith too.
Peter.