Vintage Pair of 1950s HB&W Inc. White Children’s Kid’s Flashcards w/ Green Square Patterns and Shapes, # 43 & 57 of a set of 100 cards from the Columbia Mental Maturity Scale, copyright 1959, Harcourt Brace & World Inc. New York This pair each features 5 green square shapes. CONDITION: The cards are thick card stock w/ signs of light fading/discoloration. There is a small pen mark on the corner of one of the cards SIZE/MEASUREMENTS: 19″ inch lenght, 6″ inch width