Seiko 7D46 - Operating Manual
The Seiko 7D46 is a Kinetic quartz movement developed for Seiko's professional diver’s watches, most notably the Kinetic Tuna models such as the SBDK001. It combines the reliability of quartz accuracy with the self-charging convenience of kinetic energy. The 7D46 was designed to meet the demands of saturation divers, offering high torque, long power reserve, and robust performance in deep-sea conditions.
⚙️ Specifications Overview
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Caliber: Seiko 7D46
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Movement Type: Kinetic quartz (automatic charging with quartz regulation)
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Power Source: Oscillating rotor charges an internal capacitor (energy storage cell)
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Power Reserve: Approx. 6 months on full charge
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Accuracy: ±15 seconds/month
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Functions: Time, day-date, power reserve indicator
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Crown Type: Screw-down (for water resistance)
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Hacking Seconds: Yes
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EOL Warning: Power reserve indicator via seconds hand
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