Screw Machine Products 36 station “Select-O-Phone” desk set.

1919

model
Select-O-Phone (Screw Machine Products Company)
manufacturer
Screw Machine Products Company
condition
Mint, original condition.

About

Screw Machine Products 36 station "Select-O-Phone" desk stand with marked transmitter and dial wheel on the base. A caller would turn the dial to the intended extension, pick up the receiver and a buzzer would ring at the other extension alerting the other party. The scan is from a 1927 Select-o-Phone catalog.

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