This object consists of a slide rule, case, instruction sheet, and box. The cover of the instruction sheet reads: "HOW TO TAKE CARE OF YOUR SLIDE RULE". The label on the box reads: "68 1617" "OLD 4053-3?" "POLYPHASE SLIDE RULE WITH LEATHER CASE"
Manufacturer
Keuffel & Esser Company
Place Manufactured
U.S.
Identifying Numbers
Model number
68-1617
Other number
S201
Donor's ID number for rule
Serial number
470490
Dimensions
in box: 1 3/8 in x 11 7/8 in x 2 5/8 in; overall: 3/8 in x 11 in x 1 1/2 in; overall: 1 1/8 in x 11 5/8 in x 2 1/8 in