I was looking at the V & A collection for two reasons, firstly to see whether there was any possibility that the actual glass was Elizabethan and secondly, to see whether, if it was a copy, they had got the look right.
Going on the look of the glass and in the light of John's comments it would seem that the glass was in all likelihood made at around the same time that the hallmark date shows. A Tudor revival in taste. This would tie in with the social phenomenon of successful self made businessman of the period acquiring status and social respectability by building themselves magnificent mansions and then trying to re-invent their humble family backgrounds and roots by buying in decorative items like old ancestral portraits and shelves full of old leather bound books to give the illusion that their wealth had in fact been handed down to them.
However, I would like to know the answer to the following from somebody:-
When glass and hallmarked silver are combined are the two items always of similar age or was a silver rim, for example, maybe rarely but sometimes added to a much older piece of glass, possibly as a response to changing fashions or style or otherwise to cover up a damaged edge, offer protection or change proportion.
For example, the Islamic rock crystal vase sold at auction for the astronomic amount of money had had work done at a French jewellers - not sure why or what but the point is does anyone know of examples of objects where hallmarked silver has been combined with glass from a very different time period?