Date | early 18th century |
Maker | ’Abd al-’Alī |
Place | Persia |
Material | Brass |
Inventory no. | 37940 |
Acquisition | Presented by J. A. Billmeir in 1957 |
Alidade
Appearance | Tip | Sights | Pinholes | Notches | Description |
---|---|---|---|---|---|
Double-ended, original. | Simple | Rigid | Single | None | This rule is extensively engraved with abdjad numerals, intended to resemble scales. They do not, however, correspond to any recognizable scale.. |