A couple of things Bentley. You are asking for opinions from experienced collectors, you will not get the same answer from everyone. You might...
On the reverse under the right leaves and the CA [ATTACH] [ATTACH]
Die deterioration doubling (no added value) as evidenced by the outside lettering starting to spread towards the rim.
slabs are not vacuum sealed so there will be some air in it, extreme heat followed by a temp drop can cause condensation
If there is plastic packaging with trapped air inside I would think that kind of heat would promote sweating/condensation to form
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