The 60th anniversary is also celebrated with a new quartz movement. Caliber 9F85 has a time difference adjustment function that allows the hour hand to be adjusted without stopping the seconds hand and thus preserving its high precision when the wearer changes time zones. This new caliber makes its debut in two 60th anniversary designs.
This is new quartz caliber joins the Sport Collection. In addition to the Grand Seiko blue dial, it features a ceramic bezel of the same color that is almost impervious to scratches. The markers as well as the hour and minute hands are coated with LumiBrite so as to increase the legibility of the time even in low light conditions. It has 20 bar water resistance, magnetic resistance of 16,000 A/m and a screw-down crown for enhanced security. It will be available in April 2020 as a limited edition of 2,000.

Calibre 9F85:

Caliber 9F85 has a time difference adjustment function that allows the hour hand to be adjusted without stopping the seconds hand and thus preserving its high precision when the wearer changes time zones.

A quartz movement depends on a battery as a power source. The battery sends electricity to a quartz oscillator, which vibrates at precisely 32,768 times per second. An integrated circuit (IC) detects these vibrations and sends out an accurate time signal every second to the step motor. The step motor activates in accordance with this time signal, accurately rotating a series of gears and the watch hands.

Accuracy
+10 seconds per year

Battery life
Approximately 3 years

Features
- Instant date change mechanism
- Quick correction function of time difference adjusting to a calendar