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These don't seem to be available anywhere any longer. Probably from the 1980's. Each chalk is 3 inches long and 1 inch square. There is no cover to the box - the tips of each color have been used minimally. On one side of the chalk it reads, "Made by THE AMERICAN CRAYON COMPANY Sandusky, Ohio. A Division of The Joseph Dixon Crucible Company - "Excello Squares are now supplied in fluorescent colors. Their brilliance exceeds all previous standards of color brightness and their light-reflecting qualities make them super -vivid. USE WITH BLACK OR BLUE LIGHT FOR UNUSUAL EFFECTS. Made in the USA."

Chalk Colored Vintage Fluorescent Lecturer's Chalk Excello Squares Set of 6 Colors


  • Vintage Supply
  • Material: chalk
  • Only ships within United States.
  • Feedback: 22 reviews
  • Favorited by: 2 people