A tall white mushroom cloud rises from a dark, low horizon into a deep blue sky, with an orange glow along the ground line and a reddish, textured foreground. The image is the classic profile of a nuclear detonation column and cap, of the kind widely published after the 1945 Trinity and Hiroshima/Nagasaki explosions and the 1946 Operation Crossroads tests at Bikini Atoll. No caption, location or test name is printed on the front, so the specific detonation cannot be identified from the card itself.
Linen-textured stock with visible crosshatch weave; no white border; no printed caption or imprint on the front.
No postmark; unused divided-back card. Linen-textured stock with C.T. Art-Colortone imprint of Sanborn Souvenir Co., Denver, Colo. Minor soil/spotting along top edge; no handwriting.
Cite this card
Atomic bomb mushroom cloud, circa 1946, postcard, c. 1930. PostalPast Collection. https://postalpast.com/postcard/atomic-bomb-mushroom-cloud-circa-1946. Accessed October 25, 2026.
