16610 and 16610M both fine many different countries have different card ref especially the USA which is a separate company from Rolex SA Switzerland.And as both warranty cards have long expired as M serials in reality they are just bits of plastic.And even a warranty card or paper don't always prove authenticity of any watch as with today's technology these items are the easiest to fake its the watch that's the most important.
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ICom Pro3
All posts are my own opinion and my opinion only.
"The clock of life is wound but once, and no man has the power to tell just when the hands will stop. Now is the only time you actually own the time, Place no faith in time, for the clock may soon be still for ever."
Good Judgement comes from experience,experience comes from Bad Judgement,.Buy quality, cry once; buy cheap, cry again and again.
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Second in command CEO and left handed watch winder
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