| Name | Aristo 109 Rietz Variant |
| Front Scales | 50cm / K A = B CI C = D L ] 1:25 |
| Back Scales | = S S+T T = |
| Type of Rule | slide rule |
| Material | plastic |
| Dimension (mm) | 545x40x7.5 |
| Area of Use | generic |
| Origin of Rule | Herman van Herwijnen |
| Match Number | 153 |
| Comment | |
| Thumbnail |  |