| Name | Graphoplex 630 Geometre Topographe 400g |
| Front Scales | 27cm / L B3 B = sinxcos cos2 S&T b = B B2 1/B2 |
| Back Scales | = sin sin&tg tg b2 = |
| Type of Rule | slide rule |
| Material | plastic |
| Dimension (mm) | 294x45x5.5 |
| Area of Use | generic |
| Origin of Rule | Herman van Herwijnen |
| Match Number | 1309 |
| Comment | |
| Thumbnail |  |