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Australian soldiers playing two-up during World War I in 1917

Signature: This coin game is specific to Australia.

How It Works: Two-up is a version of heads or tails in which two coins are flipped simultaneously. Bets are placed on whether they’ll both land on heads or tails. Players must gamble against one other, not against the house.

Origination: Two-up is believed to have spread in Australia’s gold fields in the 1850s and become popular among soldiers, or “diggers” in Australian parlance, during World War I.

Trivia: Every year, on April 25th (Anzac Day), Australians may be found playing two-up in local pubs. This holiday, when military war veterans are honored, is the only time this game of chance is allowed to be played legally in the country.

Photo from Wikimedia Commons