"No restrictions on access"@en . . "The postage stamp was donated to the United States Holocaust Memorial Museum in 2018 by Jeffrey Hamburger."@en . . . "No restrictions on use"@en . "German postage stamp"@en . "German postage stamp, 300 marks."@en . . . "irn670988" . . . . . "overall: Height: 1.000 inches (2.54 cm) | Width: 1.437 inches (3.65 cm)"@en . .