@ deCoppet
[#6]Roger
by studying your card I see two interesting details
a) the Card is called "Postkarte", but seems to be a card without printed value, therefore it is NOT a postcard in the PHILATELIC MEANING. It's rather a Picture postcard... The Card was only carried because it was additionally franked with a stamp!
b) The cancellation Aarau "25.XII" could be applied many hours after the cancellations on the right "24.XII". The cancellations on the right were departure-cancellations, whereas the cancellation on the left was applied on arrival.
Maybe postclark 1 cancelled the picture postcard and sorted it according to the destination. At delivery postclark 2 confirmed that the picture postcard was delivered on 25.12.
I suppose: Christmas-greetings!
Kind regards
Heinz