Torpedo Attack on Armored Sea-Sphere, Science Wonder Stories June 1929

Vivid teals, greens, and gold dominate this explosive undersea battle scene, the cool aquatic palette shattered by a burst of pink and white impact energy. A massive riveted spherical vessel—part submarine, part war machine—takes a direct hit from a golden torpedo, while smaller armored spheres drift in glowing green halos across the ocean surface. A crablike mechanical creature lurks at lower right, adding biological menace to the mechanized chaos.