Hi Elena,
Pistol grip fork Dutch in appearance.
Perhaps with the use of our imagination and an overdose of positive thinking , only based on the shape of the cartouche, we could be looking at a Dutch standard mark; the crown for 11 penningen 5 grein, used during the Kingdom of Holland 1807-1812.


If so the other mark should be the remaining of an oval cartouche or office mark.
For more information see hallmarks Kingdom of Holland.
viewtopic.php?f=5&t=32028Oel.