Thanks for sharing these photos, Derek Always nice to see old photos emerge from back in the day.
That is not a hero helmet, it is a stunt. In fact, I believe that is Simons suit from RS Prop Masters before he aquired it. All the tell tale signs are there that are unique to this particular armour. There is a thread on The Prop Den that goes into more details and has a photo similar (or same) as the one above. Interesting to see the left shin is unpainted along with the belt.
Any chance you could post a higher resolution image so I can check to see a few things or is this the best you have?