From the archival papers of Willard Wichers (a.k.a. “Mr. Holland), at Hope College. This stamp used for outgoing correspondence of the Netherlands Information Service reminds me of an old library stamp, but instead of just adjusting the date, it also could be adjusted to note the time of date.

And this stamp, from the same collection, is from the Netherlands’ Ministry of Education and Sciences. I have collected hundreds of such stamps from all sorts of countries and agencies. It might be interesting material for a reference book.