Jay-Gee Record Company and Jubilee/Josie Records, 1790 Broadway, in New York City.
Size: 7 5/8 inches square. Records up to about 6.75 inches in diameter would fit. Two of the envelopes have cardboard inside, the last does not.
The flasp on one of the envelopes shows it age with creases, but the other two flaps, and the rest of the envelopes, are in beautiful condition.
A little background on Jubilee/Josie Records from Wikipedia:
Jubilee Records was a record label specializing in rhythm and blues along with novelty records. It was founded in New York City in 1946 by Herb Abramson. Jerry Blaine became Abramson's partner, and bought out Abramson's half of the company in 1947. The company name was Jay-Gee Recording Company, a subsidiary of the Cosnat Corporation. Cosnat was a wholesale record distributor.
Jubilee was the first to reach the white market with a black vocal group when The Orioles recording of "Crying in the Chapel" reached the Top Twenty on the Pop charts in 1953.
In 1970, Jubilee/Josie was sold to Viewlex and Blaine left the company. The catalog was eventually taken over by Roulette Records.