The "Duo" globe was the first to use internal illumination to show two maps on one globe.
lit.: Lehman, R., Senn, P.V.: Erde Sonne Mond und Sterne, Berliner Globenhersteller 1790 - 1970, Lehmans Colonialwaren, Berlin 2010, p.94.
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Internal illuminated globe "Duo", published by Columbus-Verlag, Berlin
Description:The "Duo" globe was the first to use internal illumination to show two maps on one globe. lit.: Lehman, R., Senn, P.V.: Erde Sonne Mond und Sterne, Berliner Globenhersteller 1790 - 1970, Lehmans Colonialwaren, Berlin 2010, p.94. |