Dr. R. Krügener's Normal Delta Camera
(13 x 18 cm!), c. 1890
Dr. Rudolf Krügener, Bockheim/Frankfurt am Main, Germany. The largest detective camera ever built by Krügener with very interesting plate-changing mechanism!
Estimate: €  2,200/2,500
US$ 2,750/3.150
Reserve: € 1,980/US$ 2,500

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