Manufacturer: Compass
Country of Manufacture: U.S.A.
Type: 1321
Number: HK-3
Date of Manufacture:  
Scales: (Front) LL0, LL00, A [B, K, CI, C] D, S, ST, T
Scales: (Back) L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2
Number of Scales: 21
Gauge Points: M, π, C, C1, e
Slide Rule made from: Bamboo and Plastic. Metal End Pieces
Cursor made from: Plastic
Cursor Lines: 1 front, 1 back
Overall Length of Rule: 32.2 cm
Length of Scales: 25 cm
Width: 4.0 cm
Depth: 0.7 cm
Weight: 113 gm
Acquired from: Clarke Green
Date: Nov 2000
Condition: Good
 Leather case.  Good condition