The shifting red cross on this stamp reminds me of another set of “shifting red crosses” that exist on an early USA stamp (See this post for the USA Examples).
These are on the 1943 Semi-Postal 1.2k + 8.8k (Scott #B21) issued to aid the German Red Cross.
The cross is supposed to be just a bit right of the white in the background, but note a few examples I have showing the cross moving over a bit further to the left.
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