P Turner, P Tina? I've tried googling various words but to know avail. It's rather strange that one should put the signature around the pontil area, don't you think? There is the possibility that the signature could have been done by the owner rather than the maker. I just can't read the signature, especially the last letters. I don't know if this will be of any help, but can you take a picture of the drinking glass the right way up on a black background preferably in natural lighting? Sorry I can't be of any further help,but good luck in your search.