Just having a guess.It looks like the old members stand to me, it was pulled down for the Sherrin stand I think.
That photo looks a bit "touched up" though... the B+W photos from the late 40's early 50's were often superimposed one on top of another so maybe the Stand photo was taken earlier and Bobby superimposed in front of it? He looks about 20-21 there but I'd only be guessing.
Ahhh....geez I wish we had him now!
Photo is old sepia taken with wide aperture, shallow depth of field. Blurry background and sharp subject. Looks legit.
If it was superimposed the background would probably be sharp?
Whatever it is, bloody great shot. I miss those old boys, happy birthday Bobby.