Jan 10, 1949: RCA introduced the "single", the 7-inch diameter 45 rpm record in the U.S. A single could play 8 min of sound per side

Jan 10, 1949: RCA introduced the “single”, the 7-inch diameter 45 rpm record in the U.S. A single could play 8 min of sound per side

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Jan 10, 1949: RCA introduced the "single", the 7-inch diameter 45 rpm record in the U.S. A single could play 8 min of sound per side
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