Your search for "RIO (UK)" revealed the following:

KINGSTONIANS [Winy Winy / I Don't Care]

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ID No. 233119 Label RIO (UK) Production Sir JJ Genre Rock Steady / Male Vocal Group Vocal Condition VG Soundclip* Must Item.

PATRICK & GEORGE / LLOYD CLARKE [My Love / Fellow Jamaican ]

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ID No. 215920 Label RIO (UK) Production JA Genre Ska / Male Vocal Condition VG- Soundclip* パチノイズ目立ちます。

CALVIN FOLKS [You'll Never Know / Is It True]

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ID No. 240977 Label RIO (UK) Production UK Genre Ska / Male Vocal Condition VG(NOC) Soundclip* 1963 UK Early Ska Vocal.

THE PIONEERS [Never Come Running Back / Give Up]

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ID No. 235175 Label RIO (UK) Production Caltone Genre Rock Steady / Male Vocal Condition VG+ Soundclip* Caltone's Rock Steady.