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It is uniquely detailed with massive
608 Hz to deliver a phenomenal factory accuracy rating of ± 20 seconds per year
Now available for sale is a remarkable piece from that legacy
this caliber showcases the incredible engineering that went into these watches
Flipping the watch over reveals the crisp caseback engravings and the "Daini Seikosha" factory symbol
Seiko - Twin Quartz High-End Dress - 9920-7000 JDM It is uniquely detailed withThis timepiece is a magnificent artifact from December 1979, as definitively proven by the serial number 9D1023. The 99 series calibers sit at the absolute pinnacle of Seiko's golden era of electronic watchmaking, produced by the elite Suwa Seikosha factory. It houses the ultra rare Caliber 9920, a high end technical soul that utilizes two separate quartz crystals one to measure time and a second to detect temperature changes compensating for thermal
