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OSBM Bolt 
OSBM Bolt on wall [3GL].
Location
Grid reference: NN 2230 8713.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Landranger 41: Ben Nevis, Fort William & Glen Coe.
Structure: Unknown.
Waypoint: OS1373.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Spean Bridge,
5.12km to the south.
Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Spean Bridge to Loch Tarff levelling line. The surveyor's description was OSBM Bolt on wall.
Location
Grid reference: NN 2230 8713.
Landranger 34: Fort Augustus, Glen Albyn & Glen Roy.
Landranger 41: Ben Nevis, Fort William & Glen Coe.
Structure: Unknown.
Waypoint: OS1373.
Neighbouring Flush Brackets
| G1051 | Rathliesbeag 2.37km to the southwest. |
| G1052 | Allt Mairi 3.53km to the southwest. |
| G1050 | Letterfinlay 5.26km to the northeast. |
| G1053 | Spean Bridge 5.40km to the south. |
| G1167 | Aonachan 6.15km to the south. |
Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Spean Bridge to Loch Tarff levelling line. The surveyor's description was OSBM Bolt on wall.
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