Manufacturer: IWA
Country of Manufacture: Germany
Type: 1638 System Wern
Date of Manufacture:  
Scales: (Front) D, A, B, C, U, V, M, N, T, S, r, p, a, b, c, LL
Scales: (Back) None
Number of Scales: 16
Gauge Points: π, p, P, v, q, r2, r3, V, N, gF, S, gE, R, p', p"
Slide Rule made from: Plastic
Cursor made from: Plastic
Cursor Lines: 1
Overall Length of Rule: 19.5 cm Diameter
Length of Scales:  
Depth: 0.1 cm
Acquired from: Stuart Hawkinson
Date: Jan 2004
Condition: Good
 Plastic sheath.
 Instructions (includes English). Good condition
 Very unusual single rotating
 circle on a square base.