Over the years,I’ve had 2 or 3 RSD-1s on US London. Currently I’ve kept one, plus a really good counterfeit, identical except for the matrix number.
To my knowledge, the first we fans heard about The Promotional album was in 1976 in Roy Carr’s book, An Illustrated Record on page 58. He only refers to RSM-1 and it’s existence of 200 copies. In later years, RSD-1 is mentioned elsewhere such as 1
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