Manufacturer: Walter Evans
Country of Manufacture: U.S.A.
Type: Spirule
Number:  
Date of Manufacture:  
Scales: (Front) Specialised Scales
Scales: (Back)  
Number of Scales:  
Gauge Points:  
Slide Rule made from: Plastic
Cursor made from:  
Cursor Lines:  
Overall Length of Rule: 29.2 cm
Length of Scales:  
Width: 12.1 cm
Depth: 0.2 cm
Weight:  
Acquired from: Malcolm Goodge
Date: December 2004
Condition: Good
Accessories: 
 Instructions (English)
 Cardboard case
Comments: