"The Red Shoes" has some very nice color, making it a good demo piece, but IIRC, does not have the variety of greens and yellows that Oz has. (I don't have a copy to verify that, but I saw the restoration release at a SMPTE meeting a few years back.)
Use of Oz reminds me of the stereo hi-fi engineers at Motorola in the 60s, who used Tijuana Brass records for testing, not because they had the most beautiful music, but because they had instruments in every frequency range.
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Old TV literature, New York World's Fair, and other miscellany
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