HF Radio Set MQ-191, British (WS No. 19 Mk. 3)

Vehicular HF transmitter-receiver for morse or voice communication.
Used by the British military during the 1950s, designated Wireless Set No. 19 Mk. 3.
Frequency range: 2 to 8 MHz; output power: 10 Watts CW, 2.5 Watts AM; power: 12 or 24 Volts DC.
Vacuum tubes technology.