4 SPACE SHIPS THE SPACE FLEET OF THE FUTURE - PYRO - USA

Large boxed set of four Pyro spaceships, all in grey plastic. The ships are held in a vacu-formed red plastic tray molded for the wheel base of each ship.

X-100 Space Scout
X-200 Space Ranger
X-300 Space Cruiser
X-400 Space Explorer

The set was on sale in November 1957