Design theespoons, modern, maker?

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These design theespoons are marked with a makersmark and a sword. Unfortunately I can't find a match. Help would be appreciated.

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[oel]

​To me the maker's mark appears to be HP with sword in a rectangle shaped frame for H. van der Plaats, registered in Joure, 1920-1961, the sword mark with 835 used 1953-present.
H. van der Plaat could be Hendrik van der Plaat, born in Joure 23-07-1895, died in Joure 24-11-1975.

Peter.

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Thanks Peter!