~ Proletarier aller Lšnder vereinigt Euch ~
From left to right are pictured Friedrich Engels, Ferrdinand Lassalle and Karl Marx all Germans by birth. Marx and Engels were authors of "The Communist Manifesto" (1848) and considered founders of communism and together with Lassalle lead the socialist revolution of workers in central Europe in 1848 which was put down by the ruling class at the time. The porcelain stein with lithophane (scene in bottom viewable when held up to light) is ca. late 1800's.
Proletarier aller Lšnder vereinigt Euch! Proletariat (commoners) of all lands unite!
Translation: Roy De Selms
Photo credit: Unknown