I am very honored to be able to share this info with you but I can't take ANY of the credit for it. Lee (C17LM) made this discovery all on his own!!!
There appear to be a few inconsistancies near the back of the buckle. Note that the buckle from MoM is on a belt so you can't see the bottom lip of the buckle in that half of the image as you can on the bare buckle above it. Also there is a line where the green paint ends on the buckle from MoM and not on the bare buckle. That line and other details are documented on the webpage in the link below.
As a side note: I was reading, earlier today, PhantomFett's post concerning his theory of the jet pack harness being an SCBA tank harness. After doing a bit of research, I do believe he is correct and I can't wait for the correect model to be IDed. Many SCBA harnesses have a similarly styled buckle as the US Divers SCUBA harness posted in the link above. I would imagine that the buckle is simply a oem item, made by a third party, and bought by the various harness companies to be added to their rig. We are not trying to say the US Divers harness is the ONLY harness that has this buckle or that Fett's buckle has the US DIVERS brand name stamped on it. However, I do believe it to be from the same oem.