\" insured letter\", general postal service ( 3. Planned trip), inner envelope the 3. Weight step, franked with twice 5 penny and 50 penny, of it postage share from 20 penny about the treatment in the USA as registered mail to make sure. It is the mutilation, in Germany the high fee from 50 Mark for an insured letter to save, the anyway in the USA only as registered mail forwards was, because the USA the shipment form insured letter even until today not knows. Submersible stamp from 15.1.17, large\" return\" stamp, on face reimbursement cancel, reimbursement cancel ( L 4 ) in rare Type2 from Bremen over 6 ( Mark ), destination USA, sender is the society for wireless Telegraphy with b. H, well, pure commercial usage without philatelic Influence, extensive description is enclosed, letter with transport defects, nevertheless extremely rare and probably the only one exists. Michel / Geissler unknown, LP !