Much clearer.
I think this left the factory intact. Subsequently it has been damaged, rather badly and someone has ground out the damage and repolished, perhaps not as well as they had hoped.
In this pw the ring of bubbles should be level, so the base in the correct place and it should not have the phantom pontil scar, which is probably the remains of a rather serious concoidal fracture. (known colloquially as a fleabite)