Manufacturer: Aristo
Country of Manufacture: Germany
Type: Circular 621
Number:  
Date of Manufacture:  
Scales: (Front) %, C [D] conversion points
Scales: (Back) Instructions
Number of Scales: 3
Gauge Points: π
Slide Rule made from: Plastic
Cursor made from: Plastic
Cursor Lines: 1
Overall Length of Rule: 12.0 cm Diameter
Length of Scales:  
Width:  
Depth: 0.6 cm
Weight:  
Acquired from: Juergen Kuhse
Date: Jan 2004
Condition: Good
Accessories:
 Leather sheath. Good condition.
Comments: