King Radio Corp.
Olathe, Kansas

Avionics (Nav/Com) equipment.

Thanks to Mrs. Esperanza Quintero from Cali, Colombia, for the following information:

King Radio manufactured avionics equipment for general aviation, corporate aviation and airlines. A complete line of airborne navigation, communication, flight control and weather radar for virtually any aircraft requirement. The Silver Crown equipment is designed for use in single engine, light twin engine aircraft and in light helicopters. The Gold Crown line is designed for the corporate market including large twin engine, turboprop and corporate jets. The third King line, ARINC, is built to airline specifications and was flying in 1981 with more than 100 major airlines and 20 different Air Forces around the world.

1959: Ed King formed the King Radio Corporation and created the first low-cost, crystal controlled, 90 channel, VHF transceiver for smaller aircraft, dubbed the KY 90. 

1966: King Radio released the KTR 900: the first all solid state transceiver for airlines.

1969: King Radio released the KDF 800:  the first digital automatic direction finder (ADF) for general aviation.

1970: King Radio released the KX 175:  the first low cost all solid state VHF navigation and communications unit with TSO design approval

1983: Allied Corporation purchased the Bendix Corporation and King Radio and combined the two to create the now-renowned BendixKing brand of avionics.

(Manufacturer's website)