Friedrich Heinrich Philipp Franz von Hefner-Alteneck
Caption:
Friedrich Heinrich Philipp Franz von Hefner-Alteneck, April 27, 1845 - January 6, 1904, was a German electrical engineer and one of the closest aides of Werner von Siemens, reproduction of a photo from the year 1895, digital improved.
Credit:
Album / Universal Images Group / Bildagentur-online