both glasses are remarkable insofar as they lack features that usually help to provide some indication of history etc.
Both stems are about as unhelpful as could be imagined - shallow depressions under the foot, where the scar was removed, are very common for much of the C19 and C20 and optical moulding and tool marks have too long a history that equally lack indication of any particular period.
I could be wrong, but the depression I think I'm seeing isn't what I'd call 'large' - large in the sense of an early C19 Georgian depression, which often might occupy two thirds or more of the underside of the foot - this one looks 'non-large'

The assumption might be that the lack of a good ring means not lead glass which suggests not high quality, and would be interested as to why the suggestion of the period indicated in the subject heading

I don't see any mention of wear - regret I've no idea as to origin or date, other than to suggest, vaguely, middle third C20 - but am happy to be proven wrong, as always.
Sorry this is unhelpful - judging by the absence of replies I'm afraid you may struggle to nail these down.
