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    Archive Number
    6516447
    Description
    Black and white aerial photograph of Derwydd, taken by the Ordnance Survey on 2nd September 1994 at an altitude of 8,000 feet. Grid reference SN6217. Print enlargement (c. 20") taken from 9" film roll.
    Collection Name
    Ordnance Survey Vertical Aerial Photography Collection
    Medium
    Photo.
    Originator
    Ordnance Survey
    Date
    1994-09-02