you may well be correct - I've not yet had the time to look in detail. Have had a look at my pix showing drinking glasses etc. from the Kew Registrations, and doesn't appear there's anything to match, so have to assume that J.D. didn't Register any of these designs, but don't quote me on that. Certainly some of the pattern/designs from Derbyshire do carry a moulded pattern No., although my goblet doesn't, neither does yours, so not possible I suppose to be dogmatic about provenance for ours. Even with identical surface pattern, different shapes were probably given separate J.D. pattern numbers, and similar situation likely for some other manufacturers.