In a lot of 620 film that I purchased for the spools I found a box of Ektachrome develop before Apr, 1949. One end is torn off but there is a sealed roll inside. Whether it is the original I don't know. Interesting to me the box says "Processing directions packed in Kodak EKtachrome Processing Kit" and on another side "This film will not be processed by Eastman Kodak Company".