| Name | Nestler 21 a Darmstadt Variant |
| Front Scales | 55cm L / K A = B CI C = D sin.cos. ] sin tg |
| Back Scales | = LL1 LL2 LL3 = |
| Type of Rule | slide rule |
| Material | wood/plastic |
| Dimension (mm) | 580x43x12.5 |
| Area of Use | generic |
| Origin of Rule | actual item |
| Match Number | 1816 |
| Comment | |
| Thumbnail | No Picture |