Finally back on line.
I have a carafe with same gold rim as appears on one of your glasses.
[This is amongst the 'accumulation' due to no grog use for it, 'machine' made clear glass... but it was cheap and interesting illustration. Quality glass thats for sure, clear ring to it and clarity.
The illustration is highly detailed, none more so than the feather detail of the in flight parrot.
The production method I'd wondered about too. Very consistent thin depth of etch on this, across the whole work, which rules out and abrasive blast I would have thought.
There appears to be NO fold or breaks in the design that would have resulted from a flat printed decal mask applied to the curved surface on round tapered body.
One thing I did notice under lens is a few non design etch spots [omission of mask] but no unetched spots [excess mask]. This is of course assuming an acid resist mask was applied. Maybe not given observation below.
So, of note: There is one area in design best described as being at an outer margin... call it the most Westerly point in the artwork. Here the feather appears to be clipped in a very straight vertical line - Aprox 5-6mm of design [feather tip] missing.
Does your carafe have the same parrot in flight with most Easterly point being reed foliage?
In any case, do you also see any omission in the design like this, at what could be a sheet margin?
Sheet margin.... meaning no mask applied but reverse, a form of printed decal sheet applied where a reactive acid used instead of ink.. such detail would be possible. Still the problem of flat sheet trying to conform to the complex curved form though, unless stretch in sheet so it could
Another method may have been a photo sensitive acid resist mask was applied over all glass outer surface, then this mask photo contact printed [UV light], mask dissolved and then glass acid etch process done. Mask then removed. I used a similar process to etch copper on electronic Printed Circuit Boards years ago.
Other than that... around 1980 - I don't think laser was being used to surface etch glass.... abrasive water blast was, and being used to such fine tolerance.
Perhaps the retail outlet you suspect might know who produced these and how? Was some time ago... maybe everyone who worked in retail sector is gone or forgotten by now. Wish I could forget some of the 80's.
Perhaps the publisher of the illustrated books may have a lead to follow?
Perhaps Tony is still around to inquire?