Circular slide rule from Concise. 28 N ( Leen / Roel )
Concise 28N - Notes
Circular slide rule from Concise.
Many of these rules were branded with promotional or advertising logos.
Further details about this Slide Rule:
Model 28N Circular Slide Rule
Country of Manufacture Japan
Scales Front D, C, CI, A, K
Number of Scales 5
Slide Rule Materials Plastic
Cursor Materials Plastic
Cursor Lines 1 Front
Diameter 8.5 cm
Documentation Concise Circular Slide Rules 28N
Accessories Vinyl Case