Source
Source: The commercial offices of the machinery firm Carl Beermann in
Berlin. Photograph by F. Albert Schwartz (1899).
bpk-Bildagentur,
image number 20027877. For rights inquiries, please contact Art Resource
at requests@artres.com (North America) or bpk-Bildagentur at
kontakt@bpk-bildagentur.de (for all other countries).