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The original catalog description provided by the Ford Motor Company reads as follows:
Aircraft instruments, with pair of fluctuating graphs [Manometer] positioned above, mounted in passenger cabin of Ford Tri-Motor (graphs are formed by changing level of colored liquid in glass tubes in response to the varying conditions) - views of test instruments and graphs document the following flight conditions: ground check, take off, climbing, level flight, cruising speed, level flight, minimum speed, level flight, high speed, spiral to the left, spiral to the right, left motor dead, center motor dead, right motor dead, dive and pull out, roll, stall, glide without power, and landing. [1932]
#91680