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A great vintage partial original magazine article entitled: 'DOUBLE BARREL' TELESCOPE TAKES TWO PHOTOS...javing two large and two smaller tubes, a camera telescope, known technically as a "double astographic camera", which will be used in studying the Milky Way, was completed recently for Lick observatory atop Mt. hamilton, California... The piece measures approximately: 5" x 5 1/4". Condition: EXCELLENT...Certificate of Authenticity is provided.