Rule, Regula, Pointer and Alidade Images
Alidade Image:
| Date | 1587/8 (A.H. 996) |
| Maker | Muḥammad Amīn ibn Amīrzā Khān |
| Place | Persia |
| Material | Brass |
| Inventory no. | 52399 |
| Acquisition | Presented by J. A. Billmeir in 1957 |
Alidade
| Appearance | Tip | Sights | Pinholes | Notches | Description |
|---|---|---|---|---|---|
| Double-ended, original. | Simple | Rigid | Double | None |