"The mask was donated to the United States Holocaust Memorial Museum in 1999 by Dr. Edmund Goldenberg."@en . . . "overall: Height: 7.000 inches (17.78 cm) | Width: 4.250 inches (10.795 cm)"@en . . "Ether mask"@en . . "No restrictions on use"@en . . . "The ether mask was used by Dr. Edmund Goldenberg during the time period surrounding the Holocaust."@en . "irn516115" . "Metal mask with a hinged cover."@en . "No restrictions on access"@en .