Fred - as requested, some pix of Rd. 79749 which allocated to George Joseph Green with date of Registration of 21st July 1851. As you've already commented, the Register entry reads 'Set of Glassware' - although as we can see, the Representation pix show one shape only, so would assume it was the moulded design, rather than the shape that was being Registered.
As usual, information on the item is brief to say the least, and lacks any indication of size, or intended use etc. Any thoughts on what purpose this particular piece may have been designed for - it looks shallow.