JRM 22: 1947 Red or Blue Borders

JRM 22: 1947 Red or Blue Borders has at least 16 cards, 1 7/8" in diameter. They are recognizable by math problem in the curved box at the bottom. I've included here one uncatalogued card that I've found (though this one has a rock/paper/scissors symbol in a small circle, instead of a manufacturer's symbol).