June 1972
"Catalina Golden West Airlines" (= Catalina Air Lines Division of Golden West Airlines)
(From the collection of Doug Ewen jr) Click for views of the interior
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See also California Amphibian Airlines. There seems to have been some connection between the two airlines in the 1950s.
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For a brief history of Avalon Air Transport/Catalina Air Lines
(and other Catalina operators over the years), including several photos, visit: