I've a full set of these miniature tankard-shaped liqueur glasses with twisted celery handles and wrythen body, each averaging out at just under 2" / 50mm tall. I don't have an awful lot of reading matter on the subject, but they do seem in line, stylistically, with mid/late 19th century Venetian glass.
The quality seems exceptionally good, with the ribbing of the celery handle being very fine and crisp along every part. They have fire-polished rims, polished pontils and a fair bit of wear along the base rim. The glass is heavy, displays a lot of handmade variation, is slightly grey, and is slightly seedy in places.
Any clues to the maker, or alternative suggestions of age/origins, received gratefully.