Rule, Regula, Pointer and Alidade Images
Alidade Image:
| Date | ca. 1250 |
| Place | Spain (?) |
| Material | Brass |
| Inventory no. | 49033 |
| Acquisition | Presented by Lewis Evans in 1924 |
Alidade
| Appearance | Tip | Sights | Pinholes | Notches | Description |
|---|---|---|---|---|---|
| Double-ended, counter-changed, original. | Simple | Rigid | Double | None | Both tips have broken off. There is an usual and seemingly useless notch on the bottom of each sighting vane. |