
If it is, it's very early and of an experimental nature, a little taller than John's small pot.
The ground and polished rim is not right, but I can't actually see it too well in your pics.
There is a possibility it got damaged and was subsequently ground and polished to remove a chip or something.
The round, polished pontil mark would be right, I can't tell from photos whether or not you have cobalt glass as well as teal in it, (John's piece is cobalt).
Camera's simply don't pick up the differences in colour well enough.
(

heehee ) an early, experimental bit of Mdina and you are "complaining" about the lack of a mark on it? !!!!!!!!!!!!!!!!!!!
You don't want much do you?

(Please, don't take offence, I'm just teasing. This might be a rather exciting thing.)