| Date |
1505/06 (A.H. 911) |
| Maker |
Muḥammad Ṣaffār |
| Place |
Persia |
| Material |
Brass |
| Inventory no. |
51182 |
| Acquisition |
Presented by J. A. Billmeir in
1957 |
Rule, Regula, Pointer and Alidade Images
Alidade Image:
Alidade
| Appearance |
Tip |
Sights |
Pinholes |
Notches |
Description |
| Double-ended, original. |
Simple |
Rigid |
Single |
None |
The alidade
is quite unusual by being constructed out of two
intersecting rules. One is curved slightly and has a
single sighting vane. The other is more typical, straight
and with two sighting vanes. |
