Fuel Quantity Indicator 600 lbs (MD 500?) Spitfire by showing increments of quarter

by showing increments of quarter fractions from 0 degrees (Up) to fully extended 45 degrees (Down)

Here is a WWII-era Directional Gyro module of the Type A-3A Automatic Pilot system

Each deck contains four separate silhouette views of 13 different aircraft

made by Fenwal for the US Navy's Sub Hunter / Patrol Bomber Lockheed P-3 Orion

for basic instrument flight procedures and IFR

Fuel Quantity Indicator 600 lbs (MD 500?) Spitfire by showing increments of quarterThis Fuel Quantity Indicator displays fuel quantity from 0 600 lbs (~90 gal), made by Kratos. It has a date stamp of Jun 23, 1978. We aren't certain, but this may have been used in an McDonnell Douglas's line of MD 500 Defender helicopters, given its 600 lb capacity. The part number on the unit is not legible. Meausures ~2 inches diameter and ~5 inches long.