Oh man! The Tinytone TT-1 Pocket Radio is a terrific pre-transistor radio from the early '50s. There's one tube and an ingenious string-driven tuning mechanism. The earphone element is inside the radio, with a rubber-like tube attached to it that delivers the sound to your ear. Uses a 1 1/2 volt battery and a 30 volt battery. Patent notice inside claims coverage for "combinations of tube and transistor circuitry," but there is no transistor, only the single tube and very little else (a tuning coil and slug, a transformer, a volume control, the earphone element, one resistor, and three capacitors). From Western Electronics, aka Western Manufacturing of Kearney, Nebraska. They made some great crystal radios too under the Tinytone name, as well as names like Pakette, Midget, Pee Wee, Ti-Nee, and Tinymite. Their crystal radios are smaller than this Tinytone TT-1, and appear in a range of attractive and colorful designs which you'll see in my books "Toy Crystal Radios" and "Toy Crystal Radios Volume 2."