| Name | Aristo 89 Rietz (Ahrend 690) Variant |
| Front Scales | 13cm / K A = B CI C = D L |
| Back Scales | = S ST T = 5INCH |
| Type of Rule | slide rule |
| Material | plastic |
| Dimension (mm) | 155x31.6x3.8 |
| Area of Use | generic |
| Origin of Rule | Herman van Herwijnen |
| Match Number | 115 |
| Comment | |
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