This 1950s French-Canadian game is a form of bingo or lotto but played with a regular deck of cards. The game consists of a roll of red tokens and a set of 12 player boards, each showing 25 different cards in a five-by-five grid. Unlike bingo, there is no free center space on a board, nor are card values restricted to any given row or column.
The dealer or caller shuffles the card deck and turns over the top cards one at a time. Each player with that card showing on their board covers it with a red token. As in bingo, the winner is the first to cover a line of five horizontally, vertically or diagonally and call "O.K.O". The winner then becomes the next caller.
The numbering on the player boards suggest that there were at least three series of 12 available (to allow for larger groups).
The rules are printed in English and French on the inside of the box lid, along with Patent No. 207035 and the designer and publisher's address and phone number.