Manufacturer: Aristo
Country of Manufacture: Germany
Type: 0971 Hyperbolog
Number: HFO 3
Date of Manufacture: 1965
Scales: (Front) Th, K, A [B, T, ST, S, C] D, DI, Sh2, Sh1
Scales: (Back) LL01, LL02, LL03, DF [CF, CIF, L, CI, C] D, LL3, LL2, LL1
Number of Scales: 25
Gauge Points: π, p, p', e
Slide Rule made from: Plastic
Cursor made from: Plastic
Cursor Lines: 4 on front, 2 on back
Overall Length of Rule: 33.8 cm
Length of Scales: 25.0 cm + 2.8 cm extension
Width: 4.8 cm
Depth: 0.4 cm
Acquired from: John Quinn
Date: March 2005
Condition: Good
 Plastic case. Good condition