WWI.K.u.K.ETAPPENPOSTAMT №443.FELDPOSTKARTE.1918. CROATIA.ZAGREB.MILITARY CENSOR

Description

Feldpostkarte (A11).
Passed the post office in 1918.
Sent via
kuk Etappenpostamt (EtpA) = Austrian base post office № 443. to the city of Zagreb (Croatia).
Probably, the sender was a philatelist, and for some joke, a postage stamp of the Russian Empire ( Mi No. 73, Russia) was pasted. And the stamp was stamped by the Austrian military field post.