Manufacturer: Felsenthal
Country of Manufacture: USA
Type: Logarithmic Calculator
Date of Manufacture:  
Scales: (Front) S, A [B, K, D], complementary angle
Scales: (Back) T, D [C, CI, L, decimal equivalents]
Number of Scales: 12
Gauge Points: π, p', p'' on S scale, q on A and B scale, N on C and D scale
Slide Rule made from: Plastic
Cursor made from: Plastic
Cursor Lines: 1back, 1 font
Overall Length of Rule: 14.0 cm diameter
Length of Scales:  
Depth: 0.1 cm
Weight: 41 gms
Acquired from: Robert Houston
Date: July 2002
Condition: Good
 Paper case. Good condition
 Instructions (English) Good condition