Communications, Telephone Exchange.
Telephone, New York Telephone Co. Exchanges.
[Telephone operators.]
[District selector frame in a dial exchange.]
Telephone Exchange 1896 Cortlandt St. West Wing.
[New York City Telephone Exchange.]
[Telephone Exchange 1896 Cortlandt St. West Wing.]
[People observing telephone operators.]
Communications, Marconi's Wireless Telegraphing Apparatus.
Communications, Marconi, Wireless Telegraph Inc.
National City Bank. Telephone exchange room.
[Early types of switchboards, Old Spring Exchange.]