Mining and metallurgy -- Collection of 20 etchings by various artists, 1st half of the 20th century, with motifs from mining. Metallurgy and industry, including Hermann Peters, Josef Steib, Steinhauer, Trautmann, Hans Klemke, Julius Cohn Turner, Alfred Kitzig and others, each hand-signed, traces of age, sheet size up to 50 x 60 cm

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