My best guess is that it is a combination of before his time, sets using same images as before his time, and historical anomaly, and that there really is not any specific explanation such as he didn't give permission for specific reasons.
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Net 54-- the discussion board where people resent discussions. 
My avatar is a sketch by my son who is an art school graduate. Some of his sketches and paintings are at
https://www.jamesspaethartwork.com/
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