Hi Roger, welcome to the forum.
Dutch silver for the hallmarks see:
http://www.925-1000.com/forum/viewtopic.php?f=5&t=32028
Maker's mark: R under a repoussé hammer for: Gebr.(Brothers) S. & H. Reitsma or S. Reitsma, registered in the city of Sneek during 1892/1948
If you look carefully you should find a date letter and assay office mark.
Oel.