I got five of these small saucers a while ago as I thought they looked Georgian. The style of cutting looks similar to some of the Regency cutting shown in Hajdamach. The cutting also looks similar to reproductions shown in the fakes chapter of Hajdamach - but the cutting is very sharp as you can see and they have a slightly greyish tint. There is quite a bit of nibbling to the rim but can’t determine much wear as the base is quite rough.
They are actually cut from a pressed ‘figured blank’, where the cut pattern is already pressed into the blank, the pressed pattern is then cut. What looks a bit like a flake chip in the first closeup photo, and what looks like a drop of water at the apex of the ‘v’ on the second closeup photo are actually the remains of the pressed pattern, areas not reached by the cutting wheel. The inside of the dish is smooth but with a very slight ripple that can’t be felt. 90mm diameter.
Seems the figured blank is more associated with American brilliant cut glass. I can’t find anything obvious about figured blanks in Hajdamach, McConnell says the figured blank was invented by Henry Fry in America and that ‘until c.1904, all cut glass was derived from mould-blown blanks’. The ‘mould-blown blanks’ would have been the plain ones with no pattern, not figured.
There is a reasonably interesting bit about figured blanks here:
https://www.brilliantglass.com/figured-blanks-2/ from ‘The House of Brilliant Glass, specializing in American brilliant cut glass’. They say ‘The “figured” blank is best regarded as a pollutant and, with few exceptions, should be destroyed’.
Interestingly, at the end of the page, in the section ‘A Precursor to the American-Made “Figured” Blank?’ they show a footed mantle vase with a slight, greyish tint that is of origin unknown. They speculate it maybe an English example from the mid 19th century, quoting Elville, 1953, p. 73 (from English Table Glass?) for possible corroboration, as far as I can make out pre-dating Fry’s ‘invention’ of c.1904.
I think my dishes might be another example of the earlier English version of the technique.