I'm sorry I missed your post - that one is by Carl Gunther (I linked a couple of other pieces by him earlier). That's a beautiful example, thank you for continuing to look for me
I have some more possible names - or at least a small headway
Having received the Harrach book, there are only three examples of a similar cameo technique in there that I could find.
None of them are three layer glass i.e. blue/pink/red over white over clear. They are all two layer.
Of the three that have the top layer also engraved -
One of them (page 140) is a blue over clear cameo glass portrait becher.
It's dated c,1850 caption says 'engraved at Harrachov, Johann Veith (decorative part), portrait the work on an unknown engraver'. i.e I think, the cutting of the outline round the medallion and the plain blue line of decorative trim at the rim and foot was by Veitch.
The other two are on page 177. They are floral .
One is blue on clear water tumbler with bullrushes on in the blue, dated 1854-1855 - the caption refers to a wine jug and and tumbler documented in 1854 with Alois Pohl
noted as the engraver.
Further on in the caption it mentions there were colours of ruby red, pink and green variants. And says refer to delivery lists for Lobmeyr from 1854-1855 with Anton Sacher
noted as the engraver.
The other is a very tall vase blue on clear with the acanthus scrolls and a figure of a hunter, hound and deer (the lenses around the bottom of this one are a similar shape to those on mine). Dated c. 1860.
Most interestingly it refers to the book AH9 (I presume this is a Harrach pattern book), where it say that in that book the vase is sketched with engraved decoration of entwining vine tendrils with leaves
. Further reference say 'the form was also recorded in the delivery for .... from 21 June 1855 .....caption Rosa hohe Champagnervase 21".... engraved by Franz Mohr
and Alois Pohl
... ' .
Very unfortunately none of these pieces are three layer glass. It's a big book, 430 pages, so are the other two books I've been through ... and still no definite link to Harrach.
And interestingly, no Karl Pfohl identified pieces in there in the same technique ( I've not looked at clear engraved glass examples).
I'm beginning to wonder about Harrach not being the source for the three layer pieces.