THE EARLY PERIOD. Serbian 10π. PS (G.ASPIOTI FRERES CORFOU issue) with canc. "TRESOR ET POSTES*512*17-4-16" and "ΚΕΡΚΥΡΑ*6 ΑΠΡ. 16" to Budapest with Serbian censorship canc. "PREGLEDALA/VOJNA CENZURA (6)" in violet. The first known day use of a new type of censorship mark.