Lockheed P-80 Fighter Blueprint, General Arrangement, 1949 Hudson The knob rotates the barometric

The knob rotates the barometric pressure adjustment

was primarily used in aircraft of the Japanese Army such as the Type 4 Mitsubishi Ki-67 Peggy Bomber

Vertical Speed (Rate of Climb)

25in diameter and ~3in deep

We assume that these are identification marks of the timepiece and its manufacturer

Lockheed P-80 Fighter Blueprint, General Arrangement, 1949 Hudson The knob rotates the barometricThis is a blueprint of the US Air Force Lockheed P 80 Shooting Star, the first jet propelled fighter of the USAF to see combat. This document came to AeroAntique from the estate of a Lockheed aeronautical engineer who worked on projects with C. L."Kelly" Johnson. This blueprint appears to be a reduction of the General Arrangement master blueprint showing views and dimensions of the front, right side, and top of the P 80 aircraft. The inset table lists