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Rolex NFC
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Includes timekeeping accuracy test, amplitude measurement, beat error test, timekeeping stability test, long power reserve test, automatic rotor efficiency test, function test (such as date verification), anti-magnetic test, movement lubrication check, and cleanliness inspection.
The weight of a watch with a Japanese 5A movement differs by 7 to 10 grams from the original, and the weight of a watch with a Swiss 12A movement differs by 2 to 5 grams from the original.