Mayall 4-meter primary blank

[KPNO 4m primary] Mayall 4-meter primary blank

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The 158-inch Cervit blank on the occasion of final inspection at the Owens-Illinois plant in Toledo, Ohio on January 7th, 1970. In the central hole are Dr. Hiltner, Dr. Nicholas U. Mayall, and a representative of Owens-Illinois.

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