Tin case containing mathematical instruments belonging to Chandler Raymond Keller
when he was a child. The case is light blue with printed text on the front: "Set of | KENT | No. 606 | Mathematical Instruments" and an illustration of a child using the instruments. Inside the lid of the case is printed "Tables with Metric Equivalents" and "Theorems." The case includes two compasses, a protractor, a set square, and a ruler. "C. Keller" is etched into several instruments.