Frederick Post Company
||Donor's ID number for rule
overall: 1/2 in x 5 1/8 in x 1 1/4 in; overall: 1/2 in x 4 7/8 in x 7/8 in
The slide rule cursor is a magnifier. The case is labeled with the manufacturer name and the model number 1441. The object consists of the slide rule and case.
Pre-computer: slide rule
Gift of Mike Konshak