Compass, Direct Reading Magnetic, US Navy Mark X Japanese and shutter speed is adjustable

and shutter speed is adjustable from 125 to 500

SBD Dive Bomber

to show the direction in which the airplane is pointing

steel cylinder by two small slotted screws

Compass, Direct Reading Magnetic, US Navy Mark X Japanese and shutter speed is adjustableThis WWII era Direct Reading Magnetic Compass Mark X, Kollsman FSSC number 88 C 855 was made for aircraft of the US Navy. 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 dial, which turns the double