Quote from instruction booklet (1976): "America has finally made the commitment to change its weights and measurement system from the Anglo-American system, which we now use, to the metric system."
Contents (from box lid):
1 instruction sheet
1 reference booklet
50 playing cards
9 game boards
60 miniature metric rulers
Gameplay: One person is selected to be the caller, and takes charge of the deck of cards. The rest of the players get different game boards depicting 9 objects or people and corresponding US measurements such as "7oz bottle of soda". The caller reads off a metric measurement, and then players say if they believe they have the matching US measurement depicted on their card, they get to cover that picture with a miniature metric ruler. The first player to cover all of the pictures on their cards wins the game. If answers are disputed, players can refer to the reference book.