Now you have me questioning myIt just seems like there should be some kind of standard for determining the worth of gold or silver, etc.. If purity is .90, then it should be valued at .90 of of spot for .999 or .9999. I realize that the old coins weren't made with that in mind but dang, it just seems awfully convoluted.
And this is why I stick to well marked coins, though the pre-33 gold should be GTG.