French army postal service 20 C purple brown horizontal strip of three with gutter postal stamps issue 1916 Semeuse on smooth background (semeuse cameo) on liable to charges registered letter of a member of the Interalliierten governmental commission for Upper Silesia / Ami for inward to Paris, single circle TRESOR ET POSTES * 26 - 4 21 * 184 * (OS handbook number FP1 d), various transit and arrival postmark at back, transport traces