Compass, Direct Reading Magnetic, US Navy Mark X P-80 and curious

and curious

which indicates with the thin inner pointer

It also has the USN stock # of R88-I-1331

The SCR 269 system (see diagram)

This is a Horsepower Indicator

Compass, Direct Reading Magnetic, US Navy Mark X P-80 and curiousThis WWII era Direct Reading Magnetic Compass Mark X, Kollsman 398 01 2702 was made for aircraft of the US Navy such as the seaplane JRF 5 Grumman Goose. The interesting aspect of the design of this compass is that the directional mechanism lies horizontally within the rear chamber, and displays the direction on a vertically mounted compass card. In addition, the desired course heading can be selected by rotating the knob at the bottom center of the