Breaking the News, Lititz Express, July 4, 1907

"The Lititz Express." Printed on the back of this postcard: "Souvenir, July 4, 1907. Power demonstration on Express Printing Company's float."

Evidently, the Lititz Express, a newspaper published until the 1930s in Lititz, Lancaster County, Pennsylvania, printed this punning illustration with a press on board its Fourth of July parade float in 1907. I've heard of souvenir printings "on the ice" for frost fairs when the River Thames in London froze over in past centuries, and I have some menus and other items that were printed aboard ships during cruises, but I can't recall seeing anything else printed during a parade.

Has anyone else encountered any other examples of printing on ice, parade float, ship, train, plane, automobile, or in any other unique circumstances?