On March 31, 1949 the RCA Victor company officially introduced the 45 rpm to the American public. In the weeks prior, RCA shipped custom window displays to record stores around the country. Each consisted of a rotating carousel, a 45-rpm turntable and a package of promotional copies of the first seven singles, along with a 'Whirl-Away Demonstration Record' containing snippets of music with voice-over extolling the virtues of the new system. RCA also created individual colors and a different numbering system to identify the seven musical catagories.
Preview sheet shipped with the seven singles: