The first icelandic cancellations
Roman types and grotesk (lapidar) types as well as 3 ring number cancellation "236 and "237".
Extensive documentation with images (in German).

The Bøgh-Fakes
Incorrect use of danish cancellations on icelandic stationerys (in German).

The Issue "King Christian X. 1920 - 1937"
Statistical and Special (in German)