OS benchmark - Silverburn Estate, Flax Mill
Introduction
The photograph on this page of OS benchmark - Silverburn Estate, Flax Mill by Richard Law as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
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![](https://s0.geograph.org.uk/geophotos/06/22/34/6223445_67b4103c.jpg)
Image: © Richard Law Taken: 7 Jun 2019
An OS cutmark on one of the quoin stones of the large barn in the estate grounds; originally levelled in 1967 at 7.614m above Ordnance Datum Newlyn.