This is a pair of physics pulleys, designed for teaching practical science in the classroom (or at home, if you are homeschooling). They are in the original box, which reads "Ideal Physics Pulleys the Classroom is the Birthplace of Genius." The box is also marked on the side "Ideal School Supply Company Oak Lawn, Illinois 60453 Made in Japan 5420." The box is 4 5/8" x 5." The pulley wheels are 2" wide and 1 7/8" wide. They are in excellent condition.
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Spotlight on Vintage Jewelry this week at Ruby Lane. Check out my participating sale items!