Manufacturer: Fowler
Country of Manufacture: England
Type: Twelve-Ten
Number:  
Date of Manufacture:  
Scales: (Front) C, CI, D, D, S, ST, T
Scales: (Back) None
Number of Scales: 7
Gauge Points: π, r2, R, q, r3 , conversion factors
Slide Rule made from: Metal
Cursor made from: Plastic
Cursor Lines: 2
Overall Length of Rule: 8.6 cm diameter
Length of Scales:  
Width:  
Depth: 1.0 cm
Weight:  
Acquired from: Walter Andersen
Date: Dec 2003
Condition: Good
Accessories:
 Leather case
Comments:
 Two "D" scales. On sub-divided in
 tenths and the other twelfths.