On This Day in Telephone History September 28TH 1915 Chicago Telephone Company Installs Four-hundred-thousandth Telephone. At six o'clock in the afternoon of September 28TH 1915, the four-hundred-thousandth Bell telephone to be placed in service in the city of Chicago was installed in the private Office Of Mayor William Hale Thompson at the city hall.

On This Day in Telephone History September 28TH 1915

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On This Day in Telephone History September 28TH 1915 Chicago Telephone Company Installs Four-hundred-thousandth Telephone. At six o’clock in the afternoon of September 28TH 1915, the four-hundred-thousandth Bell telephone to be placed in service in the city of Chicago was installed in the private Office Of Mayor William Hale Thompson at the city hall.