Signed in pencil in the margin lower right: "Prof. R. Koppitz. Photographer's stamp on the reverse: "PROF. RUDOLF KOPPITZ, PHOTOWERKSTÄTTE, WIEN, V. ZEINLHOFERG. 8, as well as further stamp: "Nachdruck verboten!. Inscribed and numbered by Liselotte Tavs-Koppitz, as well as numbered in pencil by another hand. [2004]
