. . "Rectangular piece of paper, front is blue, verso is nuetral off-white. From has white text and diagrams. Across the top reads\"D.R.P.a. Anlage \" there is a view of what appears to be the larger object and then a detail image of a lightbulb in a cage and base. There is a signature printed in the bottom right corner\"Wilhelm Enf?rthe?\""@en . "irn538730" . "Restrictions on use. Copyright on material created by members of the extended family are either out of copyright or copyright is undetermined."@en . . "No restrictions on access"@en . "Blueprint"@en . . . "The blueprint was donated to the United States Holocaust Memorial Museum in 2014 and 2016 by Jackie Gish."@en . . .