Various stamp information

This section of my stampsite will deal with stuff that is hard to find in most catalogues and may still be very useful for collectors.

Right now you can find the following subjects here:

A detailed study of the various types of Dutch postage due stamps of the "number in chaincircle" type.
A complete list of all different pointcancels that have been used in the Netherlands between 1852 and 1893.
Syncopated perfs: "Roltanding" stamps between 1925 and 1933
International Court of Justice official stamps from the Netherlands: learn to spot forged overprints
the story behind the triangular airmail stamp from the Netherlands
It's a dove stupid! Some mistakes made in the Scott listing for the Netherlands
some peculiar Dutch stamps of recent years.
a list to compare catalogue numbers for the Netherlands. Recent years are not included.

Furusato or prefectural stamps - a guide on how to deal with them. (a work in progress)