zSOLD Panasonic UFO Flying Saucer TRANSISTOR Extension Speaker! Sold. Thanks SO Much Charles! Mint condition early 1960's Extension speaker. Panasonic Model SPT-501. Super neat UFO design. Will work with any transistor radio with earplug plug. Makes small transistor SOUND LOUD!! Measures 9" wide by 6 1/2" high. WORKS GREAT! Mouse over images to enlarge image to the right