not wishing to diminish a lifetime's habit for being contentious ................

this thread is a good example of how beginners and some not so beginners are confused as to the provenance/attribution/age of some glass designs, especially older drinking glasses which can be a minefield at the best of times, and this is compounded as we know only too well by the added difficult of screen only images.
Personally, I disagree with the sort of copying that provides immediate confusion as to 'is it old or not' - if a glass maker is going to produce such pieces there should be an obvious and easy way of determining that a piece is modern. When such obviousness isn't apparent it's a God-send to life's fraudsters, let alone the honest amongst us who are simply confused and bewildered, and it's not difficult to imagine these appearing on ebay as 'old' drinking glasses.
On the assumption that the OP's glasses are by the maker they suggest, then purchased new these are not cheap glasses, and simply as a point of irony it would in fact probably be cheaper to go and buy the real thing than a modern copy that lacks the interest etc. of a genuine antique.
Pub and tavern drinking glasses from the C19 can be found at most antiques and many auction locations for sums of money less than what it appears these are priced at new. I appreciate of course that the Op may well have bought these as pre-owned glasses, and therefore not at full retail prices.
Of course, it may be that there is some defining feature on the glasses in question, added by the maker, to show that these are in fact modern and not antique, and it would be interesting to know if this is the case. An example of this sort of added feature is the stylus/dremel addition on the blue glass produced in recent years by the Bristol Blue company in the U.K., where copies of C18/C19 Bristol blue glass designs have been produced.
Drinking glasses from as recent a time as "since the 1970s" would not normally be expected to show the sort of wear as suggested by the OP in the comment .............. "There is a fair amount of wear under the foot so maybe they're older than I thought" - perhaps they were owned by some heavy drinkers.
Yesterday, I bought a Davidson CRYSTOLAC tumbler dating to the mid 1940s (the dot method etc. of dating), and I doubt by the sound of it my tumbler has as much wear as these more modern goblets.
So, it you've nothing else to do today, expound your thoughts and annoy anyone you care to....... anyway, I'm now out for the day
