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    Archive Number
    6511365
    Description
    Black and white aerial photograph of Ystradgynlais, taken by the Ordnance Survey on 29th June 1969 at an altitude of 8500 feet. Grid reference SN7910. Print enlargement (c. 20") taken from 9" film roll.
    Collection Record
    Ordnance Survey Vertical Aerial Photography Collection
    Medium
    Photo.
    Originator
    Ordnance Survey
    Date
    1969-06-29