PS posted from "VOJNA POSTA*Br.20*30.9.17", via "VOJNA POSTA*Br.315*30.9.17" with Serbian censorship "PREGLEDALA/VOJNA CENZURA (86)" in violet (No.86, period of use October - early November 1917) to Bogat. In M.R.Vukovic study the period ofuse is from October to early November 1917. In this item the date is 30 SEPTEMBER 1917!!!.