. . . "Postage stamp"@en . "overall: Height: 11.000 inches (27.94 cm) | Width: 8.500 inches (21.59 cm)"@en . "No restrictions on access"@en . "The postage stamp was donated to the United States Holocaust Memorial Museum in 1993 by David Pearlman."@en . "No restrictions on use"@en . "irn7552" . . . . "20 pfennings, issued by the Postal Office of German Democratic Republic, honoring the fighters of the underground and illustrating the stained glass window of the Sachenhausen Memorial Museum"@en .