Rare pair of WWII-era General Electric vacuum tubes, models SC-593 and 593, mounted on their original ceramic bases with cloth-wrapped wiring. These were used in military radar and communication systems in the 1940s. Military issue Made by General Electric Original ceramic mounts and vintage wiring Large tube approx. Ideal for vintage electronics enthusiasts and WWII memorabilia displays. UNTESTED BASE MISSING 2 PEGS.