Scientific Instruments Co.
||Donor's ID number for rule found on a green sticker at the back of the case.
overall: 1/4 in x 5/8 in x 1 3/4 in
The record contains a case for a pocket slide rule. "SIC" is stamped into the front of the leather case. There is a hook on the back for attachment to a pocket or belt.
Pre-computer: slide rule