Airspeed Indicator, 30-200 MPH Pioneer WWII, 1402-2D-C2-1059 F-8 Crusader the navigator observes the travel

the navigator observes the travel of fixed objects across the lens

Here is an interesting WWII US Naval gunship artifact: a Gun Train/Elevation Meter

Typically mounted on the rear housing of a 50 cal machine gun from a side/waist gun position in the aircraft

The field of view of the ball turret gunner was actually quite poor and it wasn't difficult for the gunner to lose orientation with respect to the direction of the aircraft

such as its turrets

Airspeed Indicator, 30-200 MPH Pioneer WWII, 1402-2D-C2-1059 F-8 Crusader the navigator observes the travelHere is an early WW2 era Airspeed Indicator with a maximum airspeed of 200 MPH. The paint on the face is slightly blistered but does not appear to be peeling. The case is in fine shape for its age.