Hello all (thanks for the heads-up, Anne).
I previously commented on these in
http://www.glassmessages.com/index.php/topic,37495.10.html and
http://www.glassmessages.com/index.php/topic,37495.10.htmlI now have English pint/20 ozs/560ml and 12 ozs/340ml tankards in this pattern in flint, blue, green, brown and amber. They are all heavy crystal and ping nicely. None is backstamped, and all have nicely ground pontils.
I am nowhere near them at the moment, so can't post any new photos. Sorry.
From my notes I can say, the blue and green colours are a perfect match for some Stuart Stratford bowls and glasses that I had (just like Paul S's, above). The amber is a molten caramel colour, darker and richer than the WF studio amber (quite Webb-like, in fact). The brown has a pinkish tinge and is much paler than bottle glass. None of the colours is UV-reactive.
I haven't ever seen any other colours. I guess blokes didn't fancy drinking beer out of pink pots...
I have two 1-litre/35 fl oz jugs in the same six-point pattern (in flint). One straight-sided and conical (a classic Stourbridge shape, so I'm told). The second with base and rim of equal diameter, but with a in-curved egg-timer waist. I spotted one of the latter among the mass of pieces that used to be lined up near the entrance to the Red House Glass Cone museum in Stourbridge six or seven years ago (maybe they still are). Don't know whether those items were all Stuart or not, but a lot of them definitely were.
I also used to have a half-litre conical jug and small posy vase with a crimped rim, both in flint.
I hope that all makes sense. If I had to guess, I'd say the glasses are Stuart. But I wouldn't want to pick a fight over it.