Clipper Cargo Pan American McKnight KaufferOriginal vintage advertising poster for PanAm designed by one of the most renowned poster artists of the 20th century Edward McKnight Kauffer (1890 1954): For quick results ship by Clipper Cargo There's no business in slow business Pan American World Airways the world's most experienced airline. colourful illustration showing a clipper cargo aircraft flying over the sphinx and pyramids in Egypt with a caravan of camels walking through the desert in