Fine Art publisher and greetings card manufacturer from 1860, with works at 19-21 Marien-Strasse, Berlin and premises in London and New York. See more here. The firm also produced hold-to-the-light
cards, based on technology developed before postcards. Quoting from Anthony Byatt's "Postcards and their publishers":
"Hagelberg .... was one of three judges at an exhibition of the process sponsored by Siegmund Hildesheimer as early as 1881". There is an article on
hold-to-the-light cards on the TPA site, with an extended account imminent.
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