Atelier J. Hamann; Johann Hinrich W. Hamann; telephony; room of Mr. President Krauskopf; silver gelatin paper; black and white positive process; total: height: 23.80 cm; width: 29.80 cm; dry stamp: recto: J. HAMANN; Hamburg; titled and dated: verso: handwritten in lead: No. 11; Hamburg 1894; Fernsprechwesen; Zimmer des Herrn Pr鋝identen Krauskopf; in typewriter font: Copyright by; All film and reproduction rights reserved! J. Hamann; Hamburg 36; Valentinskamp; 41; studio for photography of all kinds; awarded Hamburg 1899; reporting photography; interior; table; study/library; means of communication (mail; telegraph; telephone); Hamburg