Object consists of slide rule and leather case. Printed on slide is, "ORTHO-PHASE LOG LOG." Handwritten on flap inside the case is, "ROGER CARPENTER," along with address and phone number.
Date
1954 ca.
Manufacturer
Pickett & Eckel, Inc.
Place Manufactured
U.S.
Identifying Numbers
Model number
500
Other number
1948
Copyright date on slide
Other number
G-10
Printed on back of slide
Other number
H-10
Printed on front of slide
Other number
S183
Donor's ID number for rule
Serial number
02C0488
Dimensions
overall: 7/8 in x 12 5/8 in x 2 3/4 in; overall: 3/8 in x 12 1/8 in x 1 7/8 in
