The face looks all wrong... too "round"? http://www.aucmcoins.com/inventory/20-double-eagles/1923-20-saint-gaudens-pcgs-ms64/ Compare to a random one at David Lawrence:
I have never seen copper spots on anything other than original coins.... I'm not saying counterfeits don't exist with copper spots... but I have never seen one.
But if there's some sort of slab number to look up, and if it doesn't register with any of the US grading companies, uh oh we have a problem. And there's also the slabbed coins where the numbers show a completely different coin altogether.
The die crack running through the top of LIBERTY also indicates a used die. Aside from the face, look at how weak the top half of the torch is on yours versus the example you posted below for comparison.
Yeah, I think the die was starting to fall apart leading to weak strike on the upper obv. and the unusual appearance.
Revisiting this thread, I agree it looks like a good coin. I'm much better at grading Saints now vs. 5 years ago so I focused on: (1) The die argument makes sense. It's why the left foot toes are not defined that well and why the face is flatter/rounder than higher/oval. (2) Capitol Building is not sharp, either. (3) But right-side of gown has the 3 "V's" which are tough to replicate on counterfeits. (4) "Pits" in gown elsewhere match up with legit Saints. (5) Copper spots likely indicate authenticity.
I actually like the look of her face on that coin. A few extra pounds never hurt a girl. And I see absolutely no reason to question the authenticity it’s just worn out dies