Rule, Regula, Pointer and Alidade Images
Alidade Image:
| Date | 13th century |
| Place | North Africa |
| Material | Brass |
| Inventory no. | 41122 |
| Acquisition | Bequeathed by T. G. Barnett in 1935 |
Alidade
| Appearance | Tip | Sights | Pinholes | Notches | Description |
|---|---|---|---|---|---|
| Double-ended, replacement. | Decorative | Rigid | Single | None |