Hi welcome to the forum. Yes these are pseudo marks or fantasy marks together with legible (hall) marks, Dutch lion passant above 2, 2nd standard silver mark, fineness 833/1000. Three Saint Andrew's Crosses pseudo town mark Amsterdam (#537), the cross a pseudo maker's mark (#465), double circle pseudo maker's mark (#415)
The maker's mark on your image is not clear, could it read GD109
If GD 109 it is for : Gerrit van der Dussen, maker’s mark D* and D109 and GD 109, registered in Schoonhoven 1866-1912.
Please show us a clear enhanced image of the maker's mark. And check for other marks like Minerva head or office mark and year letter. Thanks.
For Dutch (hall)marks see:viewtopic.php?f=5&t=32028