Munchkin's Dice Bag "Special Rule"

[MunchkinMan]

It's the Munchkin head, and only the Munchkin head which replaces a 1 on a standard Munchkin d6. Any other image that is not the Munchkin head doesn't work with the rules on the bag.

Aside from that, no Jumbo D6 has a Munchkin Head on it, let alone in place of a 1 (they all have a 1 on them, regardless of the imagery).