Hi - welcome to the GMB

Apart from any labels, a lot of their material was given a backstamp, in a small sized font, which in the case of drinking glasses would have been under the foot, usually, but not everything was marked.
I'm looking at the Linda and Stuart Smithson book - page 55 top left - which shows three separately sized drinking glasses from the 'Sharon' range .................. designed by Frank Thrower in 1970 for his daughter Sharon, and given the reference FT 115.
If these aren't 'Sharon' then they're close ................... the problem with hand made glasses is that over a period of time there may be small differences that creep in to the basic design - depending perhaps which worker was responsible for making them. The book shows a sherry, claret and a goblet, but unfortunately doesn't provide any heights, so can't make comparisons with yours. Again, the teardrop looks to differ slightly with yours too, but what appears to vary a little more is the width of the stem where it meets the bowl. Would suggest you're correct re the right hand piece being a sherry, but your other glass is much wider at the rim than those in the book.
Assume you've been looking on the Replacements.com site - which we use frequently for help with id - I notice that their site doesn't include a bowl as wide as your left hand example. Regret I've no idea as to whether you're correct in saying this pattern is produced currently.
I'm going to say I think you're probably correct with 'Sharon', but that left hand glass worries me slightly - sorry this is inconclusive for you,
let's hope someone with more knowledge of Dartington looks in.
