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Keywords from Image Description:
Jacob Hilsdorf Carl Friedrich von Siemens. de Portrt von Carl Friedrich von Siemens Nicola Perscheid Theodor und Jacob Hilsdorf August Sander Der rheinlandpflzische Beitrag zur Geschichte der Photographie Katalog Landesmuseum Mainz Creator Jacob Hilsdorf PDoldauto Jacob Hilsdorf Siemens Carl Friedrich von Siemens CarlFriedrich