This pin was made by Jonette Jewelry Co. and depicts a chalkboard in great detail with both a piece of chalk and an eraser on the ledge. Below the chalkboard hangs charms of a calculator, a ruler, a math book, and pencil and an apple. Measuring 1 3/4" wide and 2 1/2" down to the bottom of the ruler charm, it is signed JJ on the back, in pewter and ready to be added to your collection. JJ stands for "Jonette Jewelry Company". Jonette Jewelry is a family-owned business in Rhode Island & has been making collectible costume jewelry for over 60 years. As of September 1st 2006, JONETTE JEWELRY COMPANY, (JJ) CLOSED IT'S DOORS AFTER 69 YEARS OF PRODUCTION! This would make a great gift for a teacher or professor.