| Date | 1925 |
| Maker | Charles Frewen Jenkin |
| Place | Oxford |
| Material | Aluminium |
| Inventory no. | 41427 |
| Acquisition | Presented by C. F. Jenkin in 1925 |
Alidade
| Appearance | Tip | Sights | Pinholes | Notches | Description |
|---|---|---|---|---|---|
| Single-ended, replacement. | Flat | Rigid | None | Single | One sight is missing, the other has a single notch. |