| Name | Diwa 551 - 1 Darmstadt Variant |
| Front Scales | 28cm / L K A = B CI C = D P S T |
| Back Scales | = LL1 LL2 LL3 = |
| Type of Rule | slide rule |
| Material | plastic |
| Dimension (mm) | 295x46.2x5.5 |
| Area of Use | generic |
| Origin of Rule | Herman van Herwijnen |
| Match Number | 775 |
| Comment | |
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