"Flat, circular, metal disc with a castle, a central building flanked by taller, cylindrical towers, embossed on the surface and two pin closures on the back."@en . "No restrictions on access"@en . "irn735885" . . . "overall: | Diameter: 1.000 inches (2.54 cm)"@en . . "United States Army Corps of Engineers lapel pin worn by Fred Siegfried Aron during his military service in World War II."@en . . "The lapel pin was donated to the United States Holocaust Memorial Museum in 2020 by Dennis Aron, the son of Fred Siegfried Aron."@en . . . . "No restrictions on use"@en . "US Army Corps of Engineers lapel pin owned by Fred Siegfried Aron"@en . . . .