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    Archive Number
    6514508
    Description
    Black and white aerial photograph of Nant Gwrtheyrn taken by the Ordnance Survey on 20th March 1973 at an altitude of 8000 feet. Grid reference SH3444. Print enlargement (c. 20") taken from 9" film roll.
    Collection Name
    Ordnance Survey Vertical Aerial Photography Collection
    Medium
    Photo.
    Originator
    Ordnance Survey
    Date
    1973-03-20