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OSBM Bolt 
OSBM Bolt on concrete block, NW side of road, 9' SW from angle of hedge, 4' NE from W angle of house opposite side of road [3GL].
Location
Grid reference: SM 9603 2334.
Landranger 157: St David's & Haverfordwest.
Landranger 158: Tenby & Pembroke.
Structure: Concrete block.
Waypoint: OS0591.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Haverfordwest (1953),
7.48km 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, NW side of road, 9' SW from angle of hedge, 4' NE from W angle of house opposite side of road.
Location
Grid reference: SM 9603 2334.
Landranger 157: St David's & Haverfordwest.
Landranger 158: Tenby & Pembroke.
Structure: Concrete block.
Waypoint: OS0591.
Neighbouring Flush Brackets
| S7824 | Treffgarne Lodge 290.69m to the southwest. |
| S7823 | Weir Castle 1.32km to the north. |
| S0577 | Corner Piece PH 1.53km to the south. |
| S7822 | Wolf's Castle, Railway Bridge 2.95km to the north. |
| S7825 | Southlays 2.98km 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, NW side of road, 9' SW from angle of hedge, 4' NE from W angle of house opposite side of road.
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