腕時計の精度（どのくらい正確に動作するか）を数値化したものを「歩度」といい、通常は日差に換算した値を使います。 The final word quartz movement. Caliber 9F incorporates many special systems that increase the efficiency of quartz on the significant specifications of Grand Seiko. “Which’s what’s cool about Grand Seiko. Getting a perfectly finished watch would be the rule rather than the e... https://dickk763dzu5.ourcodeblog.com/profile