Hi, could be Dutch silver (hall)marks, standard mark, lion passant above 2 (833) or ll (835) with export key ( below the sterling standard 925). Check for more marks; office mark Minerva head and maker's mark.
For Dutch (hall) marks see: viewtopic.php?f=5&t=32028
Please clean and show all marks of fork and spoon(enhanced clear images). Top left of the lion passant could be a maker's mark.