With regard to the polished base - mmm, they do have a highly polished lightly concave pontil marks nearly right to the edge. There is a tiny rim showing on both the French and the Bohemian pieces and actually probably slightly more on the French ... but not like the rim showing on say, an S&W piece. The pontil mark is nearly the entire base but not quite.
But the cameo does have it polished absolutely almost right to the edge - slightly concave and at first I just thought the cracked off pontil rod mark in the middle was it, until I felt it and look under light and realised it had been polished over but not quite enough to remove the remains of the rough spot left by removing the pontil.
Presumably not thick enough glass to polish it deep enough, so it's a shallow concave right to the edge but the mark is left.