Vintage etched drinking glass

Could anybody please advise me the possible age of this drinking glass or where to find further information please. It has a Pontil mark on the bottom. Thank you.

Probably a late victoriana / edwardian copy of a Georgian one like this

The decoration always suggests a later date, although some earlier ones were decorated in Victorian times, which reduces their value. I always try and use old glasses to drink from but I broke my wine glass recently and haven't been able to find a replacement. I always like them undecorated.