The Ministerial Post Office on Corfou. Registered cover fr. with 2x25c French stamps (foreign registered letter rate) canc. with linear "POSTES SERBES" and posted from "MINISTARSKA*7.6.17" with Serbian censorship canc. "CENSURE/MILITAIRE SERBE" (type XIII/A, M.R.Vukovic study), arr. "ZURICH*6.VIII.17".