Size - might have a bearing?
Very neat base, punty has come off very cleanly, unless they used a gadget.
Can't work out whether the outside is silver leaf or a grey powder. Whichever it is, I suspect it was dipped in water to crackle and then blown out a bit while melting the cracks in.
Since nobody else has risked making a fool of themselves.....I'll jump in!
If it is British, I think I'd be inclined to follow up either with Iestyn Davies, or Paul Barcroft, or Malcolm Sutcliffe, but these are more inspired guesses than anything else and may not even be inspired!
