@VKurtB All of the genuine GSA CC hard packs/cases should have uncirculated coins, and the cases should be sealed (i.e. you can't open it like a modern US Mint set by twisting the case and getting a small screwdriver in between the front and back pieces, but they are not completely "tamper-proof"). There are three types of legit hard cases, as well as a "Soft Pack" (pic attached).
The only reason I mentioned possible rub marks and an AU grade is if it wasn't a genuine GSA hard case. There have been some knock-offs floating around that have cases which can be opened with AU coins or counterfeit uncirculated coins in the cases, which is why I asked if the case opens.