Attitude Gyro Horizon Indicator, A4D-1 Skyhawk F-104 According to the Waltham website:

According to the Waltham website:

This manual is stamped on its inside title page NAS Guantanamo Bay CUBA

and may have been installed aside others like it in a large multi-engine piston-powered aircraft

This is a nice specimen of the Single Throat Power Venturi Tube used across US military aircraft of the US Army Air Corps/Force and US Navy before

Attitude Gyro Horizon Indicator, A4D-1 Skyhawk F-104 According to the Waltham website:This is a 1950 60's era Attitude Gyro Horizon Indicator as used in early versions of the US Navy Marine Corps Jet Fighter Attack Aircraft Douglas A4D 1 Skyhawk, made by Bendix to a Douglas spec (see data label). See diagram of A4D 1 instrument panel from its flight manual dated 1962. This indicator has a service label of Naval Air Station (NAS) Alameda CA dated 1967. The left knob adjusts the indexing 'aircraft' within the dial to align the