I've been wondering that myself....i have an at pro also and would just like to know the very same thing....
I'm not wealthy enough to actually own any of the gold coin denominations,however,
I have thought about taking my atp down to a friend of mine who is always buying and selling gold and silver and checking in on him
When he might have just bought a gold coin from someone an let me air test it right there
On the spot....then i would know for sure.
Just a thought........i have been hunting for ANY size or denom. Gold coin for a very,very long time but no luck so far.
What bugs me a little though...is if i had my loop over one during the 1980's
When I used too much discrimination!!!! And passed it up!
Probably shouldn't think about it...
I know with the huge amount of pull tabs and stay tabs I've been digging up, my chances a little better now (digging them on purpose!!)
HH