The other not mentioned marks are Dutch pseudo marks and these particular pseudo marks are used by silversmiths in the Dutch city of Schoonhoven.
Also used by Herbert Hooijkaas. Fa.(Firm) H. Hooijkaas 1874-2008; Zilverfabriek Schoonhoven:
https://www.925-1000.com/forum/viewtopi ... 37#p184837
The third image what you called
....that really aren't a mark lol, actually is a Dutch standard mark, the so called sword mark for small work silver, minimum 833 fineness or higher. Struck horizontally across it, the Dutch export key: mark to indicate 2/3 duty restitution upon export valid 1853 till 1953
For Dutch (hall)marks see;
https://www.925-1000.com/forum/viewtopic.php?t=32028
Peter.