The marks on the clasps hinges.
The maker's mark a Fleur-de-Lis, unidentifiable or....?
It could be for Johannes van Geelen, registered in Gouda 1695-1739, his maker's mark a Fleur-de-Lis, in shield with round base. For his mark see below;
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Peter.
Source;
Dutch goldsmiths'and silversmiths'marks and names prior to 1812, Gouds zilver, werk van goudse zilversmeden (tot 1813) Stedelijk Musea, Gouda 1980.