| Manufacturer: | 
  Aristo | 
  | Country of Manufacture: | 
  Germany | 
  | Type: | 
  958 Geodat 360o | 
  | Number: | 
    | 
  | Date of Manufacture: | 
  ~ 1964 | 
  | Scales: (Front) | 
  T, arc, DF [CF, CIF, CI, C] D, P, S | 
  | Scales: (Back) | 
  1-cos, 1-cos, A [ B,1/tan(a/2), sincos, cos2 ] D, L, K | 
  | Number of Scales: | 
  20 | 
  | Gauge Points: | 
  π, p'', p' | 
  | Slide Rule made from: | 
  Plastic | 
  | Cursor made from: | 
  Plastic | 
  | Cursor Lines: | 
  1 front, 3 back (including ER) | 
  | Overall Length of Rule: | 
  33.1 cm | 
  | Length of Scales: | 
  25.0 cm | 
  | Width: | 
  4.8 cm | 
  | Depth: | 
  0.4 cm | 
  | Weight: | 
    | 
  | Acquired from: | 
  Hans Kiesinger | 
  | Date: | 
  Dec 2008 | 
  | Condition: | 
  Good | 
  | Accessories: | 
   Instruction (German). Condition good
 Cardboard case.  Condition good
  | 
  | Comments: | 
   
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