Curt_O._Schaller_-_Leica_M
Curt O. Schaller CC-BY-SA-3.0 https://commons.wikimedia.org/wiki/File:Curt_O._Schaller_-_Leica_M.jpg
Curt O. Schaller CC-BY-SA-3.0 https://commons.wikimedia.org/wiki/File:Curt_O._Schaller_-_Leica_M.jpg