Hmm, can't say I saw it at Dulwich - but then again, Denis organised the display for 27 shelves and there were only 18, so plenty of items didn't get displayed!
I'll mail you privately about this 'weight.
I think Christine's "seventh" one does resemble the one top-left in the promotion card. The edges are slightly different, but the hand-cutting might have been responsible for the different appearance. Hard to say without comparing it.