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OSBM Bolt 
OSBM Bolt on concrete block, NE side of road, 3' SE from hedge junction opposite side of road [3GL].
Location
Grid reference: SM 9541 2839.
Landranger 157: St David's & Haverfordwest.
Landranger 158: Tenby & Pembroke.
Structure: Concrete block.
Waypoint: OS0595.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Haverfordwest (1953),
12.56km to the south.
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, NE side of road, 3' SE from hedge junction opposite side of road.
Location
Grid reference: SM 9541 2839.
Landranger 157: St David's & Haverfordwest.
Landranger 158: Tenby & Pembroke.
Structure: Concrete block.
Waypoint: OS0595.
Neighbouring Flush Brackets
| S7821 | Letterston, Harp Inn 1.10km to the northwest. |
| S0576 | Wolf's Castle, School 1.79km to the south. |
| S7820 | Ty Goch 2.06km to the northwest. |
| S7822 | Wolf's Castle, Railway Bridge 2.14km to the south. |
| S7819 | Newbridge 3.48km to the north. |
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, NE side of road, 3' SE from hedge junction opposite side of road.
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