go on, you're just saying all that - bet all these glasses are really yours Anne

Hi Martyn - This is an example of either staining or flashing - the former was for the better off folk - the ruby-staining/coating (invented by Friedrich Egermann c. 1832, apparently), was thicker than the cheaper flashed versions. So it depends on how thick the red overlay is, as to which of these methods apply to the piece here, although often the quality of the engraving will help to indicate which.
This example is Continental I'm sure since the scar under the foot is circular in appearance, and hollow pontil rods were not used in this country as a general rule in the C19.
Probably from Bohemia, but as to date then not easy - it's predictable to say second half Victorian period, but I recall Ivo saying - and I've no reason to doubt his wisdom - such pieces were made prolifically in the C20 too.
I wonder what they drank from these glasses - white wine perhaps. Nice little glass - in fact I don't have an example.
What do others think about a suitable date?