I regularly see Mark @ the Denham Car Boot off the M40/A40. and having got to know him and trade our likes and stuff I have no hesitation in stating that it would be the bulk standard Atlantic (stax) original
Either a USA Stax
or a UK-Decca London
I gave Mark a DES copy on MD and maybe he's letting his audience enjoy the excellent stereo mix that has been created, When the car boot returns in 2012 I will ask him when I see him as we rummage for our old R&B gems.
Sadly Stax still only had their 2 track tape machine when GO and The Markeys This Night were recored hence BOTH tracks commercially will always be in their mono form. Add to that the awful vault fire that Atlantic had, and loosing so many of their rare masters any chances of doing anything had gone up in smoke.
[Note: that the retro release of GO on the green and orange label by WEA K 10109
(after the Kinney one with the blue and orange label) the label states that it's stereo don't get excited, its very 100% mono]
Can anyone tell me about the version of Green Onions that Mark Lamarr talked over in most the late 'God's Jukebox' shows on BBC Radio 2? It always sounded subtly different from the familiar old 1962 version, but maybe it was the original version..?