Military Post Offices. Degree of Rarity. Cover posted from "VOJNA POSTA*Br.4*22.1.18" (M.R.Vukovic study page 175, rarity V) with Serbian censorship "PREGLEDALA/VOJNA CENZURA (??)", via "VOJNA POSTA*Br.603*22.1.18", arr. "MINISTARSKA*1.2.918".