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    Archive Number
    6537082
    Description
    Black and white aerial photograph of Cwm Prysor Viaduct, taken by the Ordnance Survey on 21st May 1971 at an altitude of 7,500 feet. Grid reference SH7738. Print enlargement (c. 20") taken from 9" film roll.
    Collection Name
    Ordnance Survey Vertical Aerial Photography Collection
    Medium
    Photo.
    Originator
    Ordnance Survey
    Date
    1971-05-21