San Antonio local label of the 50's owned and run by Hymie Wolf from his Rio Records record store (Wolf Recording Co.).
The label released numerous recordings of local San Antonio bands including some of the first recordings of Flaco Jimenez. Most Rio 78s and 45s are quite rare because sales were small due either to Mr. Wolf's limited distribution or to the fact that no one heard or wanted them. Hymie Wolf did not believe in promotion, even going so far as to charge radio stations for copies instead of paying them to play his records as was the general custom at the time.