Western Electric 100-series loudspeaker set. It was part of a loud speaker set used for railway train dispatching in the 1930s. 100E loud speaker set . 100E loud speaker set, and foot switches .
Western Electric 100-series loudspeaker set. It was part of a loud speaker set used for railway train dispatching in the 1930s. 100E loud speaker set . 100E loud speaker set, and foot switches .