door In 1910, the so-called blokstempels (block postmarks) were introduced for travelling post offices: tram, train, boat. With hundreds of different postmarks, it is an El Dorado for the postmark collector.
Many of these postmarks are easy to find and cheap. The stamp type was also in use for a long time. From 1910 until well into the 1970s.
But, again, the exception confirms the rule. There are also rare ones that are not cheap either. But beware. There is a lot of philatelic making. Of these, of course, prices are considerably lower.
There has also been a novelty service of block postmarks. Request postmarks where the postmark was the purpose and not the correspondence. These request postmarks can be found with cheap(er) postmarks as well as rare ones.
Pictured here is a rare postmark: Utrecht/Amersfoort/III. All Utrecht/Amersfoort postmarks are rare.
Although this card has to do with the circular service, in this case it is genuine correspondence.
The card was written by Mr Pfeiffer, organizer of the new issue service and addressed to the well-known philatelist Jan Dekker, who apparently participated in the circular service under a pseudonym.
