When did NASA officially declare the Omega Speedmaster flight qualified for all manned space missions?

Answer

March 1965

NASA officially declared the Omega Speedmaster flight qualified in March 1965, making it the only timepiece to receive this specific certification from the agency at that time.

When did NASA officially declare the Omega Speedmaster flight qualified for all manned space missions?

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Why NASA chose the Speedmaster - Best explanation you will hear

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