75/4457 Hertz-Lücker, M. [= M. Klinckenberg] (1894-1962). "Max Klinckenberg". Cliché print, 8,5x7,2 cm., monogrammed and "1918" in the plate. Idem. "Ex libris Marga Hertz-Lücker". Cliché print, 6,7x8,3 cm. - AND 6 others by the same, ±1920.