Hi,
Thought this might possibly be Victorian...........
There are some very obvious ‘ stretch marks’ on its neck.
Its rim which is flat has been fire-polished—it’s also a bit uneven.
It looks as if its pontil mark has also been fire-polished.
It has a lot of base wear.
Colour—a turquoise blue
Height— 20cm ( 8” )
Weight— 553gm
Its tumbler has a small bump on its rim ( tool mark? )
Any thoughts appreciated—thanks for looking

Scott