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OSBM Bolt 
OSBM Bolt on concrete block, 9' N from NE angle of crossroads.
Location
Grid reference: SN 3738 5283.
Landranger 145: Cardigan & Mynydd Preseli.
Structure: Concrete block.
Waypoint: OS0669.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Cardigan,
17.84km to the southwest.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Cardigan to Aberystwyth levelling line. The surveyor's description was OSBM Bolt on concrete block, 9' N from NE angle of crossroads.
Location
Grid reference: SN 3738 5283.
Landranger 145: Cardigan & Mynydd Preseli.
Structure: Concrete block.
Waypoint: OS0669.
Neighbouring Flush Brackets
| S7788 | Plwmp, Capel Crugiau 927.85m to the southwest. |
| S7787 | Ffynonddewi 1.26km to the east. |
| S7786 | Ysgol Gynradd Gwenlli 2.00km to the east. |
| S7789 | Pentregat 2.17km to the southwest. |
| S0547 | Synod Inn 3.34km 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 Cardigan to Aberystwyth levelling line. The surveyor's description was OSBM Bolt on concrete block, 9' N from NE angle of crossroads.
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