| Name | Diwa 201 Technical Variant |
| Front Scales | 27cm / K A = B CI C = D L ] 1:25 |
| Back Scales | = S S&T T = |
| Type of Rule | slide rule |
| Material | wood/plastic |
| Dimension (mm) | 290x38.7x11.4 |
| Area of Use | generic |
| Origin of Rule | Herman van Herwijnen |
| Match Number | 749 |
| Comment | |
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