Hi everyone,
I am very glad to inform you that I have news about this topic...
After a hard searching through internet, I have found this
online advertisement of a Brazilian HeroQuest box where you can see at the background a copy of the unknown brazilian poster!!
The first thing that has drawn my attention was the poster size, it makes it soooo coool... Compared with the game box it seems to be huge!!
According to the number of parts it seems to be folded (8 parts around Din-A4 size, probably) I can guess that its total size approximately corresponds to a Din-A1 (841 x 594 mm).
In the advertisement pictures can be also seen some other rare items of the brazilian version of HeroQuest such as two furniture assembly flyers, one poster order form and one games catalogue of Estrela company, the brazilian distributor of HeroQuest.
Then,
runnar was right about the brazilian poster, it shows the box art, as you can check there.
Enjoy!
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