1960. Early releases consisted of reissues of 10 inch albums from the BCP 1000 Series. 5000 series The 5000 series of 12 inch LP records commenced in 1957 but only released six albums. 6000 series The 6000 series of 12 inch LP records commenced in 1956 and ran until 1964. See also List of record labels References External links The Pictorial Discography of 1000 Series Bethlehem Discography Jazz record labels