Cunningham, Imogen. (1883–1976) Spiral Back, 1929Spiral Back, 1929. Gelatin silver print posthumously printed by Rondal Partridge. Dry stamp to mat on the lower right from the Imogen Cunningham Trust, signed by Rondal Partridge in ink on a label from the Trust affixed to the mount verso. 5 15 16 x 7 13 16 in. (15. 0 x 19. 8 cm), matted to 14 x 18 inches (35. 5 x 45. 7 cm.), unframed. The photograph is accompanied by an additional label from the Imogen Cunningham Trust, which provides the title and