Having now seen these pics (although it seems that this morning the page has been removed), I'd say that these cant be the original moulds, and not the moulds AA could have used to make his Stunt helmets.
Reason?
Looking at the face the following things stand out....
1) Left eyes (as youre looking at it) doesnt have the bump, so NOT the stunt
2) Teeth appear to suggest the Stunt helmet, ie there are more than the 3 teeth we'd expect on the Hero
So (1) and (2) conflict.
3) Area above brow does not extend anywhere near high, forward enough to allow for the bulbous section found on the top of AA's Stunt lids
Therefore IMO this is more likely to be the buck for SDS's Battle Spec helmet. I would certainly agree that if AA maintained that these were what he referrs to as "the original moulds" then they're clearly NOT the moulds made for the 1976 helmets. However as per my points above I dont believe theyre the moulds used for the Stunt/Hero helmets either.
Jumpin Jax, as far as your comment...
Nothing signifigant, even people that have examined the real deals several times don't know it's there.
This "tell" that you (well in fact Matt) referr to is nothing new and pretty darn obvious to anyone who has access to some decent pics of one of the original TK helmets, and a number of us here know exactly what he's talking about. There are in fact a number of "tells" between an original and ANY replica - but there are also some very good reasons why they dont appear (although the reason varies between the replicas from say Brian's helmet and AA's). Most of these tells are not in the public domain and its probably right that it stays that way - but for goodness sake it really isn't rocket science to see what they are :rolleyes
Cheers
Jez