This instrument is used to measure the braking force of your vehicle.
Basically, it is clamped to the vehicle, at which time the vehicle is accelerated then stopped.
The braking force is read on the scale.
This unit is functional, though I cannot ascertain its accuracy.
It measures 12" x 5.5" x 3.5"
It is probably from the 1920's to 1930's.
This case is intact though with some wear due to age.
The cover to the case is included but has been disconnected from the case.
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