| Name | Faber Castell 1/38 |
| Front Scales | 27cm / L A = B CI C = D P ] sin tg #31-59cm# |
| Back Scales | = 1-cos2 1) sin.cos cos2 2) = |
| Type of Rule | slide rule |
| Material | wood/plastic |
| Dimension (mm) | 298x39x11 |
| Area of Use | generic |
| Origin of Rule | Willy Robbrecht |
| Match Number | 5756 |
| Comment | |
| Thumbnail |  |