Gouache/paper, 29 x 36 cm, sign. lo. ri. R. Diener, unopened. - Painter a. graphic artist, since 1910 in Hamburg, pupil of A. Illies at the Hamburg Landeskunstschule, studied 1948-51 at the "Baukreis" under A. Fiedler, dealt with the most important trends of modernism a. changed from figurative to abstract painting. - Public collections: Hamburg (Kulturbehörde). - Lit.: Rump, Der Neue Rump, Heydorn, Seuphor a. others.