We can see that it is polished flat, and done well. This is a sign of quality, so even if there is "nothing there", it does help a lot.

I can also see the way the colours are worked a bit better.

Unfortunately, I don't know who made it. I did wonder if it might be Phil Atrill, a London glassmaker who uses a lot of very fine lines of colour, but I don't think it is, now I've seen it more closely.