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Hi, not Dutch colonial but Dutch pseudo marks used by Herbert Hooijkaas, working in the city of Schoonhoven. H13 maker's mark of Fa.(Firm) H. Hooijkaas 1874-2008; Zilverfabriek Schoonhoven. Last image, Dutch silver 1st standard, lion rampant I,for silver 934/000 with 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
For Dutch pseudo see; https://www.925-1000.com/forum/viewtopi ... 37#p184837