Giant Mech Walker Battles Flood — Amazing Stories July 1941

A titanic red-and-blue mechanical walker — piloted by a wide-eyed figure visible through its dome cockpit — strides through a catastrophic flood, its articulated steel legs crushing the wreckage of wooden sailing vessels beneath churning green waves. Panicked survivors in blue cling to debris in the foreground as a massive wall of water crests behind the machine. The cover illustrates Robert Moore Williams' 'Survivors from 9000 B.C.,' blending prehistoric disaster with gleaming retro-futurist technology.