| Name | Davis & Son |
| Front Scales | 25cm / A = B C = D ] 10inch #11-20inch# |
| Back Scales | = S L T = |
| Type of Rule | slide rule |
| Material | wood/plastic |
| Dimension (mm) | 260x32x10 |
| Area of Use | generic |
| Origin of Rule | actual item |
| Match Number | 687 |
| Comment | |
| Thumbnail | No Picture |