SIGMA-TEK

a Full Line of Aircraft Navigation and Control Instruments-Namely, Flight Instruments-Namely, Horizon Gyroscopes, Directional Gyroscopes, Flight Directors, Attitude Director Indicators, Horizontal Situation Indicators, Air Speed Indicators, Vertical Speed Indicators and Encoding Altimeters; Engine Instruments-Namely, Engine Gauges, Engine Instrument Clusters, Cluster Modules, Manifold Pressure Gauges, Fuel Pressure Gauges, Tachometers and Syncroscopes and Parts Therefor; Radio Controls-Namely, Very High Frequency Navigation, Very High Frequency Communication, High Frequency Communication, Automatic Directional Finder, Automatic Temperature Control Transponders, Weather Radar and Omni Bearing Selectors; and Audio Amplifiers-Namely, Audio Panels, Interphone Amplifiers, Isolation Amplifiers, and Loudspeaker Amplifiers