Altimeter, French Armée de l'Air, 0-4,000 meters Aera Type M40 Anson this is not aviation in

this is not aviation in nature

The fluid is discolored and about 2/3rds level

which was pretty high for aircraft of that era and requiring supplemental oxygen for the crew to exceed ~12

Measures approximately 8

It is in terrific condition given its age

Altimeter, French Armée de l'Air, 0-4,000 meters Aera Type M40 Anson this is not aviation inThis French altimeter, indicating altitude to 4,000 meters, is presumed to be WW II era from an aircraft of the Arme de l'Air. Made by Aera of Paris, Type M 40, it has a knob to adjust for barometric pressure, which is displayed in the window above center. Measures ~3. 25 inches diameter and ~2. 75 inches deep. In reasonable condition given its apparent age. The knob turns and rotates the barometric scale.