Object consists of slide rule, case, instruction booklet and an "important observations" notice. The number 615 is stamped on the case.
||Donor's ID number for rule
overall: 1/4 in x 7 7/8 in x 2 in; overall: 3/8 in x 7 1/4 in x 1 1/4 in
Pre-computer: slide rule
Gift of Mike Konshak