Frederick Post Company
||Donor's ID number for rule
in box: 5/8 in x 11 1/4 in x 1 3/8 in; overall: 3/8 in x 11 in x 1 1/4 in
The object consists of a slide rule and its box. "H.C. Christian" and "Herbert Christian" are written in ink on the box.
Pre-computer: slide rule
Gift of Mike Konshak