A Century of Great Lakes Transportation, Soo Locks 1855 Sault Sainte Marie 1955

Front:
SUPERIOR SADA AINTE JUN 28 9AM 1955 MIGH MICHIGAN SOO LOCKS 1855 SAULT SAINTE MARIE ∙1955 Agr HURON FIRST DAY ONTA ERIE A CENTURY OF GREAT LAKES TRANSPORTATION MICHIGAN HURON ERIE SUPER ONTARIO 3$, SAULT SAINTE MARIE SOO LOCKS 1855 1955 MODASCO A CENTURY OF GREAT LAKES TRANSPORTATION US--49

Back:
Reverse side of this card is a Maximum. This VELVETONE Maximum is made from a photograph of the working model of the stamp, but has been demonetized and enlarged to Post Card size. Even if bearing a stamp on other side, this card MUST NOT be mailed unless bearing two cents postage on this side. KANSAS CITY. MO.. U.S.A. HAWORTH Edwin VELVETONE BY HERE