A similar Dansk tray sold for £70 on ebay though it was perfect. It was also slighty bigger with 8 dishes. I can't understand why the stamp is different from the other trays though.
I did wonder why it was called IHQ, though I figured that the last letter probably stood for Quistgard. But "JHQ", that explains it, thanks.

I don't know how old the company is but I think I remember that the letter "I" was often changed over to "J" (or vice versa) in the Victorian times and earlier. Or am I dreaming again. :roll:
It's the sort of thing that would be easily missed at a car boot as it probably looks recent to most people.