Peter,
Here's the discogs entry for Sweets' Just Friends LP on Black & Blue: https://www.discogs.com/Harry-Sweets-Edison-Just-Friends/release/3475684
Per that entry on discogs and allmusic.com, the music was recorded on July 26, 1975 in Nice. In this particular case, I don't have the music on LP or CD -- just a download -- so no liner notes. I was just relying on what I could find on the web.
Honestly, I wouldn't be shocked if the info on both sites is wrong. But neither would I be shocked if it's correct.
Regardless of the recording date, the music is stinkin' fantastic.
EDIT:
Check out the discogs entry: https://www.discogs.com/Harry-Edison-Just-Friends/release/14441765 It's the CD release of Edison's Just Friends. But unlike the URL above (for the LP), the CD page states that the recording was made on February 14, 1977 in Paris.
Nice or Paris. 1975 or 1977. I dunno!
Either way, Sweets made the record during the 70s, so it still makes the cut for inclusion in my survey.