Sacagawea Dollar Out Of Tolerance By 2 Grams Different Planchet Maybe?

Well, I am presenting an alternate hypothesis to test. At this point thin planchet also makes sense, and there are other possibilities (like acid damage) beyond those two. I'm not sure how you'd verify the missing clad layer possibility without metal testing. We would have to devise a test that could conclude thin planchet vs. missing clad layer.

Unfortunately, none of the examples I located via Google had listed a mass. A few of them did appear to have weak strikes. Sullivan has a coin currently for sale, so you could ask them to weigh it.

That was a good read thanks for the info Brandmeister I understand that process a lot better now

Obverse missing clad, NGC slabbed at HA:

https://coins.ha.com/itm/errors/200...ption-071515

Wow, that picture really shows the difference. You've got a pretty cool coin there!

That is awesome thanks everyone

Brandmeister what steps do I take now? Do I get it certified I've never done that before

Steve, grading and liquidation are way outside my wheelhouse.

The guy I would ask is Jon Sullivan, who literally wrote the PCGS article on missing-clad coins, and who just took the time to verify what you've got. He was also kind enough to answer my initial questions via email yesterday. He runs a mint error specialty business:

https://sullivannumismatics.com/sell/

If PCGS trusts his expertise in this subject, there's not much else to say. =)

I am pretty sure he has already given an opinion on it.