Cal. 8B63
1. Features Main watch with three hands (hour, minute and seconds 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)
Loss/gain ±15 seconds in a monthly rate (Except the cases when the watch is used
without time adjustment by receiving a radio signal and when it is worn on the wrist within
a normal temperature range between 5 °C and 35 °C)
4. Operational
temperature range
Between −10 °C and +60 °C
5. Driving system Step motor (Hour and minute hands, seconds hand, and the date, day and hour and
minute hands for sub dial)
6. Power source Secondary battery, 1 piece
7. Duration Approximately 9 months (Fully charged, and the Power Save is not activated)
* If Power Save is activated after it is fully charged, the watch continues to run for approximately
2 years at maximum.
8. Radio signal reception
function / radio signal
transmitting station
Automatic reception (Before 2:00 AM, 3:00 AM and 4:00 AM)
* It varies depending on the radio signal receiving condition.
* After radio signal reception, the watch will start to work depending on the quartz movement
until the next reception.
* Manual reception is available.
9. Integrated circuit Oscillator, frequency divider and driving circuit C-MOS-IC, 3 pieces
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