with my recent track record I shall play safe with this, but feel fairly sure I know it's provenance. About 333mm across the top rim, and not an easy thing to photograph. The construction appears to be a very thin clear layer over the colour (fairly attractive 'heather' rather than the grotty grey you see), followed by a quite thick clear base layer and a completely clear base and foot rim, and the pontil has been ground and polished (there is quite a substantial amount of wear on the foot). Unfortunately, there is a small flake chip by the rim. If it's what I think it is, there are two sizes quoted, but I don't have details of either. Wud obviously appreciate the expert's opinion, and grateful to know whether it is the larger or smaller and what exactly do I call the 'colour'. As always my thanks for looking.