Rule, Regula, Pointer and Alidade Images
Alidade Image:
| Date | early 18th century |
| Maker | ’Abd al-’Alī |
| Place | Persia |
| Material | Brass |
| Inventory no. | 36247 |
| Acquisition | Presented by J. A. Billmeir in 1957 |
Alidade
| Appearance | Tip | Sights | Pinholes | Notches | Description |
|---|---|---|---|---|---|
| Double-ended, replacement. | Simple | Rigid | Double | None | This is a replacement.. |