Hi Paul.
Many thanks for your detailed response, you're most kind.
I purchased this jug (for a very small amount) simple because I thought it an attractive thing. Whilst I sometimes sell things, otherwise I would be overrun by glass and ceramics, most of the pleasure for me is the discovery of new knowledge. I am aware of the pontil history and, of course, how this does not necessarily identify age. However, the colour and dimensions make it attractive and I thought it may be interesting to identify its origins.
There is a ring of small scratches around the base where the jug contacts an external surface, but whether these are sufficient to help support a reasonable age is beyond my knowledge.
Regards