That's not a bad match is it? yours also doesn't have the little tulip stem in between each arch but otherwise I think that's a good similarity.
And your bowl has a 32 point star cut on the foot. I like that cylindrical foot. Contemporary and 'spare' - stylish.
I can't come up with any 'matt' glass effects like that for Baccarat unfortunately but I think that's a good quality bowl. Is it heavy for size and does it ring nicely?
I like the cut on the foot of the decanter. That's quite elaborate for the base of something that can't even be seen from the inside like a bowl might be.
Yes, you’re right about the decanter, I hadn’t given the base much thought, it is quality. Perhaps when the butler is pouring you get a peek.
Yes not a bad match on the bowl, maybe they are from the same source but it might’ve just been fashion as shown by the Percival Vickers design. As you say, might give a clue to a date. Thanks for looking, I don’t think I’ll give it back to the charity shop

. The bowl does feel quite heavy and rings nicely when flicked.
Thanks for showing the Percival Vickers example Neil, it looks like the frosting or matting on that is similar to mine, I think I can see circular scratches. The 1868 date (from Paul for the PV design) might well fit nicely with my bowl...unless it is a later copy....