[Exhibitman]

There are many variation of these boards. I have never seen a card from any I've owned. One thing to recall is that the cards are rolled, not folded then rolled, so the board has to be thick enough to accommodate a card rolled the short way. If your board is under an inch thick, don't punch it--there are no cards, just slips of numbered paper.

if anyone has a verified board from which a card has been extracted I'd love to see it and find out its dimensions.