US postal service 1907, steamer GEORGE WASHINGTON, picture postcard with 1 C and sea mail duplex 20.7.07 to guernsey / Channel Islands as rare destination, under-franked and postage due with Tax single circle postmark "U. S. Sea post / T 2", this cancel is only to 1902 registered, transit New York with". Due 2 cents" and British tax cancel "1 d. " on face, superb