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    Archive Number
    6508105
    Description
    Black and white aerial photograph of Mona Airfield, Gwalchmai, taken by the Ordnance Survey on 23rd May 1970 at an altitude of 7500 feet. Grid reference SH4176. Print enlargement (c. 20") taken from 9" film roll.
    Collection Record
    Ordnance Survey Vertical Aerial Photography Collection
    Medium
    Photo.
    Originator
    Ordnance Survey
    Date
    1970-05-23