| Manufacturer: | 
  Aristo | 
  | Country of Manufacture: | 
  Germany | 
  | Type: | 
  Projection Slide Rule Studio 168 | 
  | Number: | 
    | 
  | Date of Manufacture: | 
    | 
  | Scales: (Front) | 
  ST, T1, T2, DF [CF, CIF, CI, C] D, P, S | 
  | Scales: (Back) | 
  LL01, LL02, LL03 A, [B, L, K, C] D, Ll3, Ll2, LL1 | 
  | Number of Scales: | 
  23 | 
  | Gauge Points: | 
  π, e, p', p" | 
  | Slide Rule made from: | 
  Plastic | 
  | Cursor made from: | 
  Plastic | 
  | Cursor Lines: | 
  2 front, 4 back (inc HP) | 
  | Overall Length of Rule: | 
  24.8 cm | 
  | Length of Scales: | 
  19.9 cm + 2.3 cm ext | 
  | Width: | 
  17.0 cm | 
  | Depth: | 
  1.3 cm | 
  | Weight: | 
    | 
  | Acquired from: | 
  Ann Sharman | 
  | Date: | 
  March 2004 | 
  | Condition: | 
  Good | 
  | Accessories: | 
   Cardboard Box.  Medium condition
  | 
  | Comments: | 
    
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