Hello Nigel mainly tableware but also vases bowls etc, I'm no expert but the following are things I have noticed about cut glass and some of the Stourbridge glass makers. If I it's really good it's signed apart from the makers I have mentioned on which I have yet to find anything signed, I'm sure Keith has shelves of Rb studio signed and unsigned. I don't have the time to photo everything but if any one wants a mark I'll try and find it. The crystal I sell fuels my own glass collection and buyers are really fussy and rightly so do not want a second as a replacement. I can spot a second in a second, as a guide seconds have some of the following, bubbles, glass distortion, they do not fit the size for the pattern, problems with uneven shapes applying to stems bowls and feet. I'm still learning it's impossible to know them all there are so many.