| Location | England Hertfordshire Old Hall Green |
| S side of: unnamed road (north of St Edmund's College) | |
| Distance (N) from Greenwich | |
| OS map details | OS Explorer: 194 |
| OS grid ref | TL 37651.22338 (537651,222338) |
| WGS84 lat/long | 51.882619, -0.001499 |
| Type | Marker 'stone' |
| Marking date | 2000 |
| Access | Unrestricted |
One of four similar markings in the parish of Standon.