RMPs - the 1920's

RMPs - Radio Motor Patrol cars

By the early 1930's even the
older patrol cars from the 1920s were
being fitted with radio receivers.
With the addition of radios in the cars
they became known as Radio Motor Patrol
cars, RMP or radio car for short.

1928 Ford Radio Motor Patrol car

This car had been retrofitted with a radio receiver by 1932
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