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OSBM Bolt 
OSBM Bolt on living rock, NW side of road, 7' SW of production of hedge, 11' from edge of road.
Location
Grid reference: SN 1839 0783.
Landranger 158: Tenby & Pembroke.
Structure: Unknown.
Waypoint: OS0926.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Haverfordwest (1969),
23.06km 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 Carmarthen levelling line. The surveyor's description was OSBM Bolt on living rock, NW side of road, 7' SW of production of hedge, 11' from edge of road.
Location
Grid reference: SN 1839 0783.
Landranger 158: Tenby & Pembroke.
Structure: Unknown.
Waypoint: OS0926.
Neighbouring Flush Brackets
| G5123 | New Inn, Amroth 1.24km to the southwest. |
| G5124 | Near Marros 1.49km to the northeast. |
| G5122 | Village Hall, Amroth 2.32km to the west. |
| G5125 | Marros 2.59km to the northeast. |
| S0621 | Llanteg 2.91km 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 Carmarthen levelling line. The surveyor's description was OSBM Bolt on living rock, NW side of road, 7' SW of production of hedge, 11' from edge of road.
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