vinyl1
Super Member
Stan Kenton's - Milestones. Capitol T190, 1955
Stan Kenton – Lush Interlude. Capitol ST-1130, 1959
Stan Kenton – Stan Kenton Encores. Capitol Reissue, ST1034
If you go by the catalog number, this one falls between 1957 - 1958.
Catalog numbers are not a reliable guide. RCA recorded the mono LM-1806 and the stereo LSC-1806 in the same year, 1954, but released the mono in 1954 and the stereo in 1958. Many other companies sat on their stereo versions even longer before finally issuing them - but gave them the catalog number they would have had if they were issued right away.