Hoagy Carmichael tune a pretty hokey one. It was covered a myriad of times: Bob Wills, Willie Nelson, Crystal Gayle, Bill Black's Combo.. etc etc.
Ole Buttermilk Sky
This version is a piano instrumental. The playing is totally competent and the recording quality is excellent. I edited out a few pops and nary a nanosecond of the original audio needed altered beyond that. I have a date and a song tile, but we don't know the pianist, just a little mystery left here.