The Adventures of Robinhood ( 1938)
Gone with the wind ( 1939)
The Wizard of Oz ( 1939)
Leave Her to Heaven ( 1945)
She wore a yellow Ribon ( 1949)
The African Queen ( 1951)
If this tecnicolor technology existed in old times, I don't understand why the majority of movies were being shot in black and white until the the middle of 1960s.