The most colourful G'n'Ts

These were at the boot fair and just blew me away. They have pontil marks that are not sharp but look as if they have been smoothed while still very warm. Is this possible? They are thickish in the wall but beautifully rounded where the lip meets the lip as it were. I can't see any maker's marks but there is evidence of age on the foot rim, and GnTs are elevated to another level with all the colourplay.
Any thoughts?