Historic Moments on Instagram: "In 1939, The Wizard of Oz achieved its breathtaking transition to color without any post-production trickery. The entire sequence was filmed on a set painted in monochromatic sepia tones to mimic the Kansas scenes. Bobbie Koshay, Judy Garland’s stand-in, wore a sepia-painted dress and makeup to open the door. As she backed out of frame, the real Garland, clad in her vibrant blue gingham dress stepped forward into the Technicolor Munchkinland. This clever in-camera