Manufacturer: Graphoplex
Country of Manufacture: France
Type: 691a
Date of Manufacture:  
Scales: (Front) L, P, Ch, A [B, T, ST, S, C] D, Th, Sh 2, Sh 1
Scales: (Back) LL01, LL02, LL03, DF [CF, CIF, K, CI, C] D, LL3, LL2, LL1
Number of Scales: 26
Gauge Points: π,p", p', R, d, e
Slide Rule made from: Plastic
Cursor made from: Plastic slightly magnifying
Cursor Lines: 5 front, 4 back
Overall Length of Rule: 33.8 cm
Length of Scales: 25.0 cm + 3.0 cm extension
Width: 4.9 cm
Depth: 0.4 cm
Acquired from: Roger Noury
Date: June 2006
Condition: Good
 Leather case. Good condition