well, someone loved my glass - quote................"I love your twist stem glass, it's beautiful."

thanks folks for the information. Mine came from a boot sale some few years back, from memory, and I don't recall having seen another subsequently, so perhaps they're rare. Not always easy to see the point of someone hotworking a separate stem and bowl for a glass that has very little commercial value, although I can see the reasoning if the piece has some half decent value.
Can't detect any colour difference in the flesh - admittedly I have shoved some black ink on the stem where I was counting the facets.
For what I paid - probably a quid or two - it's an interesting glass, and good to have an example of this fraudulent hot-worked skullduggery.
I'd agree re the classification of ebay sellers - my objection to that method is the ease and lack of 'the chase' - how much more fun to go out and hunt through boxes at an antiques fair or up-market boot sale, and then find a gem, for a song. Money just makes life too easy.