US postal service 1904, steamer ST. LOUIS, picture postcard of the ship with 1 C and sea mail duplex 16.7.04 to red scum MA, USA, under-franked and postage due with Tax single circle postmark "U. S. Sea P. O. / T 4" and transit New York 29.7.04 ". Due 2 cents", arrival red scum 29.7.04 on face