HI ,
I would not describe these as being Gadrooned , Gadrooning ,popular from the 17th c till the early 19thc was achieved by first blowing a bubble to make a bowl then regathering more glass over the bubble and blowing into a mould ,(double gathered)it could then also be manipulated to create Flamiforms and the like ,your glasses i have seen many of and it has been suggested that they are from the mid 19thc onwards, the crudity would suggest bar use ,some say possibly for Absinthe,with a sugar holder above to pour the Absinthe through, the drink then being set on fire before drinking , hence the thickness of the glass , to withstand the heat,and rough bar use .
of course this could all be a story , but its the only 1 know with regard to these glasses , some others may have a more informed opinion .
Cheers ,
Peter.