Hi welcome to the forum,
Yes, Dutch hallmarks see:
http://www.925-1000.com/forum/viewtopic.php?f=5&t=32028
Year letter B for 1911, lion passant above 2: standard mark silver .833 fineness (1814-1953) with export key: mark to indicate 2/3 duty restitution upon export valid 1853 till 1953.
I believe, if you clean the wet fruit spoon, somewhere under the black residue you will find an office mark (Minerva head) and a little maker’s mark, both marks could be spread over the object.
Tip; clean with warm water and soap, use a little silver polish with a soft toothbrush to remove the black tarnish, and finish of with warm water and soap and check for the two missing marks.
Oel.