Setchell Carlson 458R, 1950
Tube complement: 1R5 mixer/oscillator, 1T4 IF, 1U5 detector/first audio, 3V4 audio output.
Approximately 7-1/8 inches / 18 cm wide.
This AC-line-powered table radio uses one-volt tubes because they warm up almost instantly. Since this radio is also an intercom, it needs to be immediately usable when the talk button on top is pressed.