Is that a snapped off pontil mark on the unknown bit, or has it been heat finished to smooth it off in a little roundy-shaped bit?
I'm still really unsure if it might be Mdina, but my guts feel not. It seems too finely blown, especially around the bottom, and I'm still not happy with the silver chloride effects.
I do think Ivo's suggestion of Hebron should be pursued.
Is there any good age-related wear to the base?
Sometimes, if it is very fine because the piece only has a tiny thin edge on which it actually sits, age-related wear to that is much more easily found with a fingernail than the eye.
