Rule, Regula, Pointer and Alidade Images
Alidade Image:
Alidade Image:
| Date | 18th century |
| Place | Persia (?) |
| Material | Brass |
| Inventory no. | 50180 |
| Acquisition | Presented by J. A. Billmeir in 1957 |
Alidade
| Appearance | Tip | Sights | Pinholes | Notches | Description |
|---|---|---|---|---|---|
| Double-ended, original. | Gothic, simple | Rigid | Single | Single | This rule is plain and unmarked by any engravings.. |