Advance franking seal of office "Imperial Director of post office German East Africa" (Morogoro), two-line cancel "franked / with 7 1/2 H. " violet, from "MOROGORO 31 / 1 16" (large year date) as local letter, in addition to it letter piece with seal of office and same two-line cancel as well railway cancel (TPO) the midland train Zug-no. 15 a, rare, good condition, always expertized Pauligk BPP;