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2 sheets of ink drawings depicting the Berlin Zoological Garden, mid-20th century. 2 certificates commemorating the 25th and 40th service anniversaries of Otto Bliesenick as a master electrician and master machinist, respectively, dated 1954 and 1945. Each hand-colored and depicting technical equipment, pumps, pipes, etc. Finely executed. Drawings signed at the bottom by Helmuth Stockmann (1867–1938). Presumably the artist’s sketches, which were later put to use. In addition, both certificates bear the handwritten signatures of the entire staff, with approximately 50 signatures on each. Slightly foxed, browned. Each measures approx. 45 x 35 cm. Also included are additional prints of the Zoological Garden, though these date from the second half of the 20th century. All items are in a folder measuring approx. 56 x 36 cm.
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