The blade of the knife is a later replacement, made in Sweden.
Although I am not sure. The maker's mark
WE in monogram, in serrated rectangle for; Willem Entinck, registered in Groningen, 1723-1745
The other mark to the left of your image perhaps remnant of the crowned O, a later taxfree mark of 1807. Can you show us a better image of the complete marks?
Peter.