Exactly the same specification as the British Sovereign, 22 ct gold, .2354 ozs. AGW.
There is also an ARAMCO four
sovereign piece, only very slightly shy of a Double Eagle in AGW. I have seen only one of those.
I didn't think that the ARAMCO sovereign was all that scarce.
I remember seeing quite a few individual coins in Australia in the late 1970's.
Apparently, it may be that most of them have been melted down since that time, hence the high price realized at Heritage