Old Dutch silver marks

I have a small Dutch spoon with silver marks on it.
Can anybody help me figger out, who is the silver smid and which date and place it is from?
keuren.jpg

Don’t see any Dutch silver standard or contol marks.

Mark on the right appears to be a crowned F.
If so, might be a Swiss pewter quality mark.
Scroll down near the bottom of this page:
pewtertankardsflagons.com/in … =1_2_Marks