@SFOMuseum Twitter Posts This is SFO Museum's archive of the @SFOMuseum Twitter account.
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By the mid-1950s, #record companies released the majority of rhythm-and-blues and rock ‘n’ roll songs as 45-rpm singles. To promote record sales, RCA Victor introduced an affordable line of 45-rpm record players. #1950sConsumer . This tweet was posted on March 01, 2019.