| Conflict | WW II (1939-45) |
|---|---|
| Original/Reproduction | Original |
| Theme | Militaria |
| Region of Origin | Japan |
| Country of Origin | Japan |
Check the listing for details. Japanese WWII Aircraft Hand Held Slide Rule Flight Navigation Computer c. 1942. Condition: Used, Made in Japan. Listed at 175.00 USD. This Japanese WWII period aircraft analog manual computer (or slide rule) was a hand held device that I believe was used by a pilot to calculate the aircraft heading with airspeed plus the wind speed and the wind direction.