US postal service 1900, steamer empress AUGUSTE VICTORIA, coloured Litho picture postcard \"aboard. \" with 2 C and sea mail duplex 23.5.00 and number \"7\" to Aschaffenburg, despite sufficient franking not recognized, although reciprocal mail exchange took place, with Tax single circle postmark \"SPA / T 7\" on face postage due and with blue pencil \"25\" Pfg marked, besides with for sea mail very rare violet single circle postmark \"postage control . \" and handwritten \"25\", arrival 2.6.00 on face, superb