I'm taking you back today to the Kreisler definitives of the Netherlands Indies.
A little while ago, I showed you some proofs for that set, see here. As you can see, I recently received a comment from Reinier, which throws a new light (for me at least!) on those proofs. Reinier states that the proofs were by Kolff rather than Enschedé, but that production was not taken further because the authorities opted for the Van Konijnenburg design instead.
This would mean that the proofs should not be placed in the beginning of the Kreisler story, 1933, but much later. Because of the outbreak of WW2, Enschedé no longer could produce stamps for the Netherlands Indies, and G. Kolff & Co took over most of the stamp production. So this would put a date of 1940-41 on the proofs, with the Van Konijnenburg set being issued in 1941. Very interesting!
So, Reinier, if you're reading this:
a) where did you get that information from?
b) where can I read up on this?
c) would maybe the fact that these proofs were made without the side panels of the Enschedé design imply that Kolff intended to change the design of their stamp issue?
Let me know if you know and thanks so far!