Metal frame 3.25x4-3/8x7/8" deep has glass cover over cardboard insert showing "Atomic Bomb" dropping from the sky headed toward the country of Japan with the designation for the cities Tokyo, Hiroshima, and Nagasaki. The latter two have small cut-out in the cardboard next to the name and this is where a pair of celluloid pellets with interior bb are to be positioned. A rather gruesome game given the consequences but emblematic of the era. See following "A Bomb" project participants badge. Tiny wear on the blue metal frame of this but still Exc.