Flight Computer, Japanese BT-14 It contains both color and

It contains both color and black and white illustrations

The center knob adjusts the indicated air speed which is displayed on the center dial

and the second indicated 1000's of feet

It has a serial # prefix of AF57

It also depresses much like it would for a stopwatch

Flight Computer, Japanese BT-14 It contains both color andThis is an original, authentic Flight Computer used by pilots of the Japanese during WWII. Typically these were used to determine critical factors of flight and navigation while in the air. The dial on the face and the slide rotates along the reverse side. The airspeed arm rotates left and right and moves up and back along the handle. The glass on the dial is cracked but otherwise the instrument is in very good condition given its age. Measures 12 in