| Name | Marcantoni 12.5 RB |
| Front Scales | K A = B CI C = D L |
| Back Scales | S ST T |
| Type of Rule | Slide Rule |
| Material | Plastic |
| Dimension (mm) | 152.5x30.5x3.5 |
| Area of Use | Generic |
| Origin of Rule | Alessandro Manni's Collection |
| Match Number | 7071 |
| Comment | Marked ALESSANDRO CALZONI - Bologna Metal/glass cursor |
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