Gyro Horizon OV-1 As the aircraft passes 270

As the aircraft passes 270 Knots

It is in terrific condition given its age

it is in fine condition given its apparent age

These posters have been linked to a US Navy procurement order of "GPO Order 11174

The compass card containing the markings of the compass rotated to indicate magnetic north as it received signals from the master unit (in the Lanc

Gyro Horizon OV-1 As the aircraft passes 270This is a pre WWII era Gyro Horizon (Flight) Indicator, Army Type C 5, made by Sperry, part number 643770, marked for the Air Corps US Army. This indicator has a serial number prefix "AC 40", evidence of a manufacturing year 1940, prior to the US entering WWII. The C 5 Gyro Horizon was used across all aircraft of the US Army Air Corps, including bombers B 17, B 24, B 25, fighters P 38, P 40, P 47, P 51, and transport C 47. The Gyro Horizon provided