| Name | Nestler 21 Darmstadt Variant |
| Front Scales | 27cm lg / K A = B CI C = D cos / sin tg |
| Back Scales | = LL1 LL2 LL3 = |
| Type of Rule | slide rule |
| Material | wood/plastic |
| Dimension (mm) | 296x38x11 |
| Area of Use | generic |
| Origin of Rule | slide rule |
| Match Number | 2695 |
| Comment | |
| Thumbnail | No Picture |