If you have ever wondered about this tune I have discovered an easy way of memorising the chords using a symmetrical method.
The tune uses three keys a major third apart.
B G and Eb major
I call the first 5 chords "symmetry x"
they are B [D7] G and [Bb7] Eb
you then move this all down a major third using two connecting chords.
There then follows several 251's which I have called "symmetry y" and two connecting chords take you back to the beginning of this 16 bar tune.