Philadelphia Alan Klawans Delaware River Of Revolution USA / 1970 / Travel Posters / Alan Klawans / 96.5x63.5 Original vintage travel poster for Philadelphia featuring an industrial black and red abstract design by Alan Klawans with a piece about the city above: Sparks from steel mills lance the night; chemicals bulge the holds of freighters plowing eastward; refineries spill liquids for the world's wheels... you can sense it all from Delaware, river of revolution. One of a series of posters. Writer: Burnap Post. Printed by Pearl Pressman Liberty Inc (since 1906). Excellent condition.