Communications, Telephone Exchange.
Telephone, New York Telephone Co. Exchanges.
[Telephone operators.]
[District selector frame in a dial exchange.]
[New York City Telephone Exchange.]
Telephone Exchange 1896 Cortlandt St. West Wing.
[Telephone Exchange 1896 Cortlandt St. West Wing.]
Communications, Marconi, Wireless Telegraph Inc.
National City Bank. Telephone exchange room.
Communications, Marconi's Wireless Telegraphing Apparatus.
West 100th Street. New York Telephone Exchange Building.
Marconi, Wireless Telegraphing.