| Location | England Hertfordshire Old Hall Green |
| St Edmund's College | |
| Distance (N) from Greenwich | |
| OS map details | OS Explorer: 194 |
| OS grid ref | TL 37655.22275 (537655,222275) |
| WGS84 lat/long | 51.882052, -0.001466 |
| Type | Obelisk/Pillar | School | Sundial |
| Marking date | 2000 |
| Access | Restricted, but visible from public road |
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