It's a Fame recording, but most of Spencer Wiggins' later Goldwax sides were cut at Fame studios. When Goldwax folded in around '69 or '70 Fame (through Capitol) issued at least two SW 45s. This record is presumably from this timeframe, so there would appear to be a lack of clarity on the matter of who actually owns the recording.
Vivid Sound in Japan collected a few unissued Goldwax tracks on 2 vinyl complation albums in the late 1970s (Volume 2 contains a version of Wee Willie Walker's "I Don't Want To Take A Chance" without horns or backing vocals, for example). I don't have the other vinyl album, but I think Mark 'Binsy' Taylor does. I can ask him to confirm if "Let's Talk It Over" is on Volume 1, which would mean it existed in vinyl format from the late 1970s. In any case, these lps formed the basis of the CD from whence the various UK bootleg singles of the Spencer Wiggins track came. The entire CD itself was counterfeited at the time of the popularity of "Let's Talk It Over".
I bought one from a shop called Mister CD in London which was clearly 'dodgy' on close inspection; a UK-pressed CD with no liner notes whatsoever, just a CD booklet cover which was a pretty poor reproduction of the proper CD packaging.