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OSBM Bolt 
OSBM Bolt on concrete block at junction of hedges, E side of lane [3GL].
Location
Grid reference: SN 1150 3842.
Landranger 145: Cardigan & Mynydd Preseli.
Structure: Concrete block.
Waypoint: OS0606.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Cardigan,
12.08km to the northeast.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Haverfordwest to Cardigan levelling line. The surveyor's description was OSBM Bolt on concrete block at junction of hedges, E side of lane.
Location
Grid reference: SN 1150 3842.
Landranger 145: Cardigan & Mynydd Preseli.
Structure: Concrete block.
Waypoint: OS0606.
Neighbouring Flush Brackets
| S7806 | Henllan 772.53m to the east. |
| S7807 | Dandderwen 848.65m to the west. |
| S7808 | Farchog, Capel Cana 1.57km to the west. |
| S7805 | Eglwyswrw 2.65km to the east. |
| S7809 | Temple Bar 3.18km to the west. |
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Haverfordwest to Cardigan levelling line. The surveyor's description was OSBM Bolt on concrete block at junction of hedges, E side of lane.
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