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SPECIFICATIONS
1 Basic function .......................................... Main time with three hands (hour, minute, and
second hands), date display, Retrograde day
indicator, Sub dial with 2 hands (Hour and Minute
hands)
2 Frequency of crystal oscillator ............... 32,768 Hz (Hz = Hertz … Cycles per second)
3 Loss/gain (monthly rate) ........................ ±15 seconds at normal temperature range (Except
the case when the watch is used without an
automatic time setting by receiving a radio signal
and when it is worn on the wrist within a normal
temperature range between 5 °C and 35°C/41 °F
to 95 °F).
4 Operational temperature range .............. –10 °C to 60 °C/14 °F to 140 °F
5 Driving system ........................................ Step motor
(Hour and minute hands, second hand, and the
date, day and hour and minute hands for sub dial)
6 Power supply........................................... Secondary battery, 1 piece
7
Continuous operating time from full charge
.... Approximately 9 months (Fully charged, and the
Power Save is not activated).
If the Power Save Function is activated after the
watch is fully charged, the watch continues to
run for approximately two years at maximum.
8 Time setting by receiving radio signal .... Automatic reception (before 2:00 AM, 3:00 AM
and 4:00 AM)
Reception results depend on the radio signal
receiving conditions.
After having received a radio signal, the watch
will start to move depending on the quartz
movement until the next reception.
Manual reception is also possible
9 Additional function .................................. Energy depletion forewarning function,
Overcharging prevention function
10 IC (Integrated Circuit) ............................. Oscillator, frequency divider and driving circuit
C-MOS-IC, 3 pieces
The specifications are subject to change without prior notice due to product
improvements.
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  • My seiko will not adjust for daylight savings time. Model 8B63 Submitted on 11-3-2024 at 20:27

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