Thanks. It looks very similar so I feel safe in saying that this is the same piece. I think the numbers at the bottom relate to the pattern or design number and #4 looks as if it says 420/4/13. I would guess that the final number 13 refers to the height, the middle number 4 is the number in the range (the others in the photo are numbered 420/1, 420/2 etc) so is it possible that the first three numbers (420) is the design number? Just guessing though.