Actually, I think your piece is even more interesting BoBA.
It's not Earthtones, but Tortoiseshell, (Earthtones has frothy yellow bits). It's "nakedness" (lots of clear areas) is unusual.
I have two cylinder vases like this, one Mdina, the other a much shorter cylinder from Isle of Wight Studio Glass - it has the flame pontil mark, but I still think it's an experimental piece.
I've found a pic of them - but I'm afraid I don't know how to alter the colour to get rid of the allover yellow tinge, which is disguising the yellow effects in the Mdina piece, not present in the IoWSG bit.