Okki was a sister magazine to Sjors. They did use the same material and were both attachments to other, more general magazines
(the Catholic illustration in this case). Okki was and is a magazine published by the Catholic church.
Prins Valiant did appear for the first time at the 25th of august 1938. Panorama did bought 132 plates from King Features and publish
these ones till the 6th of March 1941. After that they were willing to buy more material, but the German occupying forces did not allow
import of more US comic material (it was the second world war).
This publication of Prins Valiant is the oldest in Holland & Belgium.
Value around 15 Euro's for the early numbers.