Heinrich Hamann; Atelier J. Hamann; Johann Hinrich W. Hamann; office with 14 persons (calendar Rosenberg); silver gelatin paper; black and white positive process; sheet size: height: 24.40 cm; width: 30.20 cm; dry stamp: recto u. l.: J. HAMANN; Hamburg; inscribed and dated: verso: handwritten in lead: No. 17; Hamburg; c. 1911; office with 14 persons; (calendar Rosenberg); studio for photography of all kinds awarded Hamburg 1898; J. Hamann; Hamburg 36; Valentinskamp; 41 (2x); all film and reproduction rights reserved; handwritten in lead: inventory no; technology; in typescript: Copyright by; All film and reproduction rights reserved; Photographic reports; Office (financial administration); Study/library; Calendar; Almanac