Attitude Indicator, Type ARU-11/A, USAF F4 Phantom II H-21 The timepiece itself (out of

The timepiece itself (out of the case) measures 2

The construction is that of a wood mast encased in thin metal with a cable running internally lengthwise from tip to a junction at the base

It was also used in the fighter P-40F Warhawk according to its service manual

as well as Bombers B-17 Flying Fortress and B-26 Marauder

Attitude Indicator, Type ARU-11/A, USAF F4 Phantom II H-21 The timepiece itself (out ofThis is a Cold War Vietnam War era Attitude Indicator type ARU 11 A, made by Lear, Model 4060P, part number 139001 01 04, MIL I 27610. This instrument appeared on the pilot's instrument panel of the US Air Force F4 Phantom II jet fighter. This unit has a service label from McClellan Air Force Base in Sacramento CA dated 1984. The purpose of the instrument is to rapidly indicate to the pilot the attitude, or relationship, of the aircraft with respect