PS posted from "VOJNA POSTA*Br.216*7.6.17", via "VOJNA POSTA*Br.999*8.6.17" with Serbian censorship "PREGLEDALA/VOJNA CENZURA (57)" in black (No.57, period of use June-July 1917) and posted again from "VOJNA POSTA*Br.999*13.6.17". Probably the earliest known date.
- MILITARY CANCELLATIONS Serbian military post-offices |