Label that sold the first 33 1/3 r.p.m. records

Answer:

RCA

Hint:

Not available

Explanation:

The clue refers to RCA, short for RCA Victor, the company that introduced the first 33 1/3 rpm vinyl records in 1948. These long-playing (LP) records revolutionized music by allowing longer playback than the older 78 rpm discs. The answer is straightforward—no wordplay—just a historical fact about the brand behind the innovation. If you know music history, RCA is the obvious fit.

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