73318807
Jul 13, 1981
Oct 25, 1983
Aircraft Flight Instruments-Namely, Radio Magnetic Indicators; Horizontal Situation Indicators; Gyro Compasses; (( Altitude Directional Indicators; )) Altitude Gyros; Omni Bearing Indicators; (( Altimeters; Air Speed Indicators; Vertical Speed Indicators; Mach Speed Indicators; )) and Course Directional Indicators
Electrical and Scientific Apparatus