#23

Year extrapolated from advert for Race for the Moon comics in Flash (Thorpe & Porter, 1962 series) issues 1 & 2 https://www.comics.org/issue/760804/?issue_detail=2#1628535 and advert in Race for the Moon (Thorpe & Porter) issue 22 https://www.comics.org/issue/515291/?issue_detail=2#2557685 offering a set of compendium LPs with songs issued and current in 1964 - 65.