The Volt release has matrix numbers in the 1000 series, used for local (Memphis) Stax releases (see Stax local matrix numbers). All Stax 127 scans here have the Atlantic 6295/6296 matrix numbers. Does Stax 127 also exist as a local release with the 1063/1064 matrix numbers?
I love The Beatles. They are why I wanted to become a musician. My username is derived from one of their lyrics. That said, have you noticed that they were four of the least bluesy musicians, possibly in the history of recorded sound? 12-Bar Original is solid proof that they could not play the blues to save their lives! Even Yer Blues wasn't the blues. They couldn't play R&B, either. They turned those early covers of R&B songs into excellent pop music, but there was no R&B in them whatsoever anymore. I think that's what made much of the early British Invasion so special: British groups trying and failing to replicate the sound of American R&B, and creating a whole new sound in the process.
It's a curious thing to do, nonetheless. There was another example posted earlier of The Equals with the same record issued on Bert Berns' Bang label, as well as being issued on the Shout label. Seems to me like a record company out to maximise its profits by putting the same record out twice on separate labels(assuming that, like Bang, Shout is/was part of the Webb IV group).
Such a smooth track...I once read that the B-side was originally called "Green Onions" and the recording engineer told the band that the A-side had a better claim to that title. What a great title, and a great song, too!