Autopilot Directional Gyro Kit, Type GR-2, Grumman F7F, F8F US Navy P-63 Here is a dual Tachometer

Here is a dual Tachometer for use in military helicopters

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and the lettering is perfect

This is an original soft-cover WWII-era Instrument Flying Manual

Some enemy aircraft were easily identified due to their distinctive shape and engine placement

Autopilot Directional Gyro Kit, Type GR-2, Grumman F7F, F8F US Navy P-63 Here is a dual TachometerHere is a Directional Gyro Control Kit for the Type GR 2 Autopilot System made by Electric Auto Lite for Grumman Aircraft under license from Sperry, according to its markings. The directional gyro is powered pneumatically, and the module mounted on the rear appears to provide electronic sensing of the gyro's position for transmission to the autopilot system, judging from the electrical and pneumatic connections in back. The center knob is to set the