License, verbatimPD
FHXB Friedrichshain-Kreuzberg Museum, via Europeana: image published under Public Domain Mark 1.0 (http://creativecommons.org/publicdomain/mark/1.0/). Rights statement as supplied by the contributing institution to Europeana.
Werbepostkarte "R. Jaekel's Patent-Möbel-Fabrik", Markgrafenstraße 20 [1/2]. . Europeana (aggregator, 4,000+ institutions).