Nigel I'm not sure I understand your reply, although I know it wasn't directed at me. I think Chris was just saying he was repeating what was in the Lassco ad and what they stated, and his embarrassed smiley was meant to indicate that
Please don't leave inaccuracies - no one was questioning your information, Chris was just adding to the thread I thought from reading.
Chris, I can't tell from the Lassco ad why they would have used Hailware instead of Hailglass as they haven't put a pic of the writing as far as I could see, but the Tooveys lightshade I linked to clearly has written on it Hailglass, so given they are the same shade, I would think as I think you did, that Lassco probably got it wrong.
The gorgeous lights you linked to are marked Hailware. So perhaps both pieces as Nigel says, belong to different era's in their production.