Manufacturer: Charvoz-Roos
Country of Manufacture: U.S.A.
Type: Trig-O-Log SR-III
Date of Manufacture:  
Scales: (Front) L, LL1, DF [CF, CIF, CI, C] D, LL3, LL2
Scales: (Back) LL0, LL00, A [B, K, CI, C] S, ST, T
Number of Scales: 20
Gauge Points: π, e, s, s'
Slide Rule made from: Bamboo and Plastic. Metal End Plates
Cursor made from: Plastic
Cursor Lines: 1 front, 1 back
Overall Length of Rule: 31 cm
Length of Scales: 25 cm
Width: 3.8 cm
Depth: 0.6 cm
Weight: 96 gm
Acquired from: Vince Nowell
Date: Nov 2000
Condition: Medium
 Leather case. Average condition