Advance franking seal of office \"Imperial German post office Dar?es?Salaam\", two-line cancel \"franked / with 7 1/2 H. \" black violet, with railway mail \"midland train ZUG 5 1.6. \" (without year date) to Tabora with arrival postmark, vertical archive fold, part the back flap missing and on face tear centered with hinge closed, strong with age marks, despite the restrictions rare inside the colony used document, expertized GPSY and Bothe