Thanks Kevin - It's a lovely weight! I agree there's a lot features in common between your weight and mine - dome shape, how the twists fill the dome, and finish of base/pontil. On my weight only the pontil is ground with a "frosted" finish, and it protrudes somewhat (in a similar fashion to the pontil on Monart glass items.) The difference may be to how the base was finished before grinding, as to what needed tidying up. But the manner in which the twists are drawn down through the pontil is very similar in both.
I am unable to match any of the twists/filigree, but that's not to say there are none. My weight is a good reference piece, so I shall see if I can take a photo of each of the 25+ twists and share.
Many thanks again for sharing,
Simon