Daniël Zilverberg has a brother 473243. The birthdate of the two brothers is, according to some official sources, only two days apart. This looks unlikely.
The remark about Daniel birth in the Archive of Drente can be interpreted as the 21th of May 1877. This looks more likely.
Source: Drents Archief/archief 2001.05/Bevolkingsregister Deel 3, 1900-1925
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