Pennsylvania Central Airlines

Pennsylvania Central Airlines Poster and Ad Collection: Pennsylvania Central Airlines flew Stinson A and Boeing 247 aircraft. Early in its existence, PCA faced a minor crisis in January 1937 when the Bureau of Air Commerce temporarily grounded the airline’s Boeing 247s.[16] The six B-247s were all sold off in 1937. The airline’s 15 B-247Ds were all gone by the end of 1942. Two remain in museums today—one at the National Aviation Museum at Ottawa, Ontario, Canada, and another, the City of Renton, in flying condition at the Museum of Flight, Boeing Field, Seattle, Washington.
By 1947 PCA’s route network no longer reflected its name. On April 21, 1948, the airline adopted a new insignia, colors and the name Capital Airlines.(Wikipedia)