Gustav Hertz, né le 22 juillet 1887, (heure inconnue) à Hambourg
[10.00E 53.34N / 0E40]

Auteur : The American Institute of Physics credits the photo [1] to AB Lagrelius & Westphal, which is the Swedish printmaker used by the Nobel Foundation for most prints/engraving of its book series Les Prix Nobel.
Crédits : http://nobelprize.org/nobel_prizes/physics/laureates/1925/hertz-bio.html
Licence : Public domain