Altimeter, Civilian Sally Bomber The instrument is in exceptional

The instrument is in exceptional condition for its age

The performance data appendix and alphabetical index are not included in this example

Here is a fine example of the US Navy's Aircraft Direct Reading Magnetic Compass Mark VIII

radio compass SCR-269-G is a complete operable unit capable of providing: (a) automatic bearing indication of the direction of arrival of radio frequency energy and simultaneous aural reception of modulated or unmodulated radio frequency energy

Its 115 pages cover all that is necessary to know by fighter pilots for air-to-air combat

Altimeter, Civilian Sally Bomber The instrument is in exceptionalThe knob is used to adjust the altimeter to the barometric pressure is displayed in the small window at the 3 o'clock position. The glass and case are intact, and the knob rotates, and the pointers move. Measures 3. 25 inches diameter and ~4 inches deep.