
A 1919 stamp from the Croatian area of the Kingdom of Serbs, Croats & Slovenes.
I know nothing of the arcane world of Austrian postmarks, but the cancel appears to me to emanate in Vienna.
So what's the problem? It's from an SHS cover to Vienna. One stamp missed cancellation at the despatching office, so the receiving office did it's duty and cancelled it. Finish.
Well, no. Because (did I forget to mention?) it's a newspaper stamp, and to the best of my belief these were only valid internally!
So, given that we know the SHS made a lot of use of Austrian postal whatnots captured in the endgame of WW1, is there any possibility that cancellor could have been used outside Vienna (e.g. a mobile military or postal agency) where it could have been captured?
Failing that, anyone got a sensible solution? And failing that, a bit of wild speculation will be entertained.