Hi Tim,
I've got Nigel's booklet on my lap.
Tudor Crystal was the trade name used by the Stourbridge Glass Company. (p35)
The story of the company and its work is a bit complicated - not helped by the war years.
Do you have "Art deco to post modernism"?
This is my personal opinion. There is not a whole load of Tudor "out there". It has a quality that sings out loud. While glass is a cold hard substance, and cold cut work can be very harsh, something about Tudor has a very natural seeming softness and elegance.
I have a set of fabulous Tudor wineglasses which belonged to my grandfather, which was what first aroused my interest in Tudor. I had loved them since I was a toddler.
I have since found a gorgeous jam thingy, and a small champagne.