Advance franking seal of office "Imperial Director of post office German East Africa" (Morogoro), two-line cancel "franked / with 7 1/2 H. " red-brown, from "TABORA 17.7.16" to Dar es Salaam with arrival postmark, rare Indian letter, transport traces, in addition to it letter piece with seal of office and same two-line cancel as well railway cancel (TPO) the midland train without Zug-no., expertized Pauligk BPP