| Name | Tecnostyl 41/D Variant |
| Front Scales | 14cm / P K A = B CI C = D tg SEN |
| Back Scales | = LL1 LL2 LL3 = 5.5inch |
| Type of Rule | slide rule |
| Material | plastic |
| Dimension (mm) | 150x37x4 |
| Area of Use | generic |
| Origin of Rule | Herman van Herwijnen |
| Match Number | 2508 |
| Comment | |
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