How can you tell if EQ Heads are from New Zealand Foundry

@Bobzilla Thanks!! A friend of a friend has a new set in the box he's looking to sell. He says they are the old style but no clue how to check. They are the A version with magnum intake bolt pattern was hoping they are the B version. I already have r/t heads and I doubt these will outperform those but I am thinking about snatching these up cause they are no longer made. If I can prove they are the real old good performing EQ heads.