| Name | Graphoplex Hydrolog |
| Front Scales | LL01 LL02 LL03 DF = CF CIF CI C = D LL3 LL2 LL1 |
| Back Scales | 6 12 11 1 2 = 4 5 = 3 10 9 8 7 |
| Type of Rule | slide rule |
| Material | plastic |
| Dimension (mm) | 338x49x |
| Area of Use | log/tech |
| Origin of Rule | description/copy |
| Match Number | 3055 |
| Comment | |
| Thumbnail | No Picture |