United States Shipping Board Services to Principal Ports of World. Port Eyegraph, copyright 1922, Nath. W. Hill, Chatham, N.J. Issues by the Advertising Department of U.S. Shipping Board Emergency Fleet corporation, Washington D.C., January, 1923. Printed in U.S.A.

A map of the world with data overlaid showing all the principal ports of the world (indicated by "Eyegraph Blocks") and the number of days for mail, the cost of telegraph and wireless service, and the distance in nautical miles to four U.S. ports: New York, New Orleans, San Francisco, and Seattle. Includes "Index of managing agents, their ports of departure and destinations", and legend. (SB-133).
A map of the world with data overlaid showing all the principal ports of the world (indicated by "Eyegraph Blocks") and the number of days for mail, the cost of telegraph and wireless service, and the distance in nautical miles to four U.S. ports: New York, New Orleans, San Francisco, and Seattle.