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OSBM Bolt 
OSBM Bolt on living rock [3GL] - presumably replaced in 1978 by new Bolt nearby.
Location
Grid reference: NC 2468 2281.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS1835.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Ledmore,
9.34km 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 Ledmore to Laxford Bridge levelling line. The surveyor's description was OSBM Bolt on living rock.
Location
Grid reference: NC 2468 2281.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS1835.
Neighbouring Flush Brackets
| G1809 | Inchnadamph Hotel 1.28km to the southeast. |
Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Ledmore to Laxford Bridge levelling line. The surveyor's description was OSBM Bolt on living rock.
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