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Old 9 April 2021, 01:26 PM   #1
magedoctor
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"COC" dials?

Can someone kindly shed light on these watches having dials that say "Chronometer Officially Certified"? I can't find any source that mentions them.
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Old 9 April 2021, 02:54 PM   #2
zapokee
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Gosh. Never seen that red "5" font before.
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Old 9 April 2021, 05:05 PM   #3
Dr.Smellody
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Mid to late 50s.
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