Rule, Regula, Pointer and Alidade Images
Alidade Image:
| Date | 1481/2 |
| Maker | Muḥammad Ṣaffār |
| Place | Persia |
| Material | Brass |
| Inventory no. | 39063 |
| Acquisition | Presented by Lewis Evans in 1924 |
Alidade
| Appearance | Tip | Sights | Pinholes | Notches | Description |
|---|---|---|---|---|---|
| Double-ended, replacement. | Simple | Rigid | Single | None | The rule does not fit the instrument well and appears to be engraved in a different hand, suggesting that it is not original.. |