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Bench Mark, Ballina
by Rossographer
for square G2418
Bench mark on the west wall of the door of St. Muredach's Cathedral in... (more)
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Bench Mark, Dundalk
by Rossographer
for square J0507
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OS benchmark & bolt - Upper Largo, Woods Hospital building
by Richard Law
for square NO4203
An OS cutmark and bolt on the front porch of the former Woods Hospital... (more)
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Bench Mark, Sligo Marshalsea
by Rossographer
for square G6935
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Bench Mark, Ardglass
by Rossographer
for square J5537
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OS benchmark and 1GL bolt - Aston, St Peter and Paul's church
by Richard Law
for square SP0889
An OS cutmark and 1st Primary Levelling bolt, installed in mid 1851 on a... (more)
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OS bolt & benchmark - Shap, St Michael's Church
by Richard Law
for square NY5615
An OS bolt and cutmark, dating from the First Primary Levelling survey in the... (more)
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OS benchmark & bolt - Syston, St Peter & St Paul church
by Richard Law
for square SK6211
An OS cutmark and 1st Primary Levelling survey bolt on the south face of the... (more)
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OS benchmark & bolt - Porthleven, St Bartholomew's Church
by Richard Law
for square SW6225
A primary levelling bolt and cutmark on the buttress of St Bart's;... (more)
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PA bolt and benchmark on Christ Church, Bicton Heath
by Richard Law
for square SJ4513
This is located on the buttress on the west gable end of the church; the bolt... (more)
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OS bolt & benchmark on All Saints' church
by Richard Law
for square TF4590
The original PA bolt is missing, although the hole is still there. It was... (more)
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OS benchmark and bolt on the Shire Hall
by Richard Law
for square SJ9223
A couple of geographers have photographed this 1st Primary Levelling bolt before... (more)
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OS benchmark & bolt - Llandrillo, St Trillo's church
by Richard Law
for square SJ0337
Levelled in 1942 at 161.945m above Ordnance Datum Newlyn, although the bolt... (more)
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OS benchmark and bolt - Llangollen Town Hall
by Richard Law
for square SJ2141
A First Primary Levelling bolt and associated cutmark, levelled as part of the... (more)
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OS benchmark and 1GL bolt - Carmarthen Guildhall
by Richard Law
for square SN4120
A bolt and subsequent benchmark, originally dating from the 1856-57 1st Primary... (more)
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OS bolt & benchmark - Shrewsbury, Welsh Bridge
by Richard Law
for square SJ4812
A 1st Primary Levelling bolt, and more recent cutmark, in the western parapet of... (more)
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OS 1GL bolt and benchmark - Handsworth, St James's church
by Richard Law
for square SP0389
The damaged remains of the bolt, and part of the datum line of this mark have... (more)
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OS benchmark & bolt on Pont ar Ddyfi
by Richard Law
for square SH7401
A 1st geodetic levelling bolt (just to the right of the datum line) and... (more)
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OS bolt and cutmark - Cellardyke, St Adrian's church
by Richard Law
for square NO5603
A 1st Primary Levelling survey bolt and cutmark at the side of St Adrian's... (more)
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OS benchmark and bolt - Gnosall, St Lawrence's Church
by Richard Law
for square SJ8220
A First Primary Levelling bolt and cutmark on the buttress of the church,... (more)
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OS bolt and benchmark - Haughton, St Gile's church
by Richard Law
for square SJ8620
A 1st Primary Levelling bolt, and associated more recent cutmark, on the south... (more)
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OS benchmark & bolt - St Ives, St Ia's church
by Richard Law
for square SW5140
Bolt installed in 1850, with the associated benchmark cut in 1952, and levelled... (more)
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OS benchmark & bolt - Burton-on-Trent, Congregational Church
by Richard Law
for square SK2523
An early benchmark and 1st Primary Levelling bolt, dating from early 1851, when... (more)
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Bench Mark, Larne
by Rossographer
for square D3902
Bench mark on the porch of the parish church in Larne (St Cedma's... (more)
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Benchmark and lightning conductor
by Adrian Taylor
for square NZ8911
Detail of the Ordnance Survey 1GL bolt benchmark on the south west side of the... (more)
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1GL bolt & benchmark - Sandwell, former gatehouse
by Richard Law
for square SP0190
A 1st Geodetic Levelling bolt and benchmark at the base of the one-time entrance... (more)
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West end of St. Paul's Church, Holme Low
by Adrian Taylor
geograph for square NY1353
The buttressed sandstone west wall of St. Paul's Church, Holme Low. There... (more)
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OS Bolt Benchmark, Market Place, Ripon
by Stephen Armstrong
for square SE3171
This is on the east face of the Obelisk in the centre of the Market Place. It... (more)
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OS Plug Bolt, Quernmore Cross Roads
by Stephen Armstrong
for square SD5259
This can be found on a house at the junction of Rigg Lane & Quernmore Brow.... (more)
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An OS Bench Mark and bolt
by Anthony Vosper
for square TL1395
Situated on the tower of Alwalton church.
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Just visible
by Anthony Vosper
for square SY1287
An OS Bench Mark and bolt on Station Road.
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OS Bolt Benchmark, St. Nicholas's Church, Stretton
by Stephen Armstrong
for square SK9415
This can be found on the west end of the church.
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