. . "No restrictions on access"@en . "irn519010" . "overall: Height: 2.375 inches (6.033 cm) | Width: 2.375 inches (6.033 cm)"@en . . "Square paper stamp with a graphic design stamped in blue ink on the front with the denomination 20, a Star of David, an outlined border, and Polish text. The reverse is blank."@en . . "Warsaw ghetto stamp marked 20 issued by the Warsaw Ghetto Resistance Organization (Żydowski Zwia̜zek Wojskowy). The Warsaw Ghetto in Poland existed from October 12, 1940, to May 16, 1943, when the Ghetto was liquidated by German forces. The stamps were manufactured in an effort to establish a ghetto mail office by the underground, but were not issued for use."@en . . . . "Warsaw Ghetto postage stamp, value 20, never issued"@en . "1941 April" . "The Warsaw ghetto stamp was donated to the United States Holocaust Memorial Museum in 2007 by Alfred Moritz."@en .