Specifications

Cal.

8T61

8T63

8T67

1. Features

Basic watch with three hands (Hour hand, minute hand and small seconds hand)

Basic watch with three hands (Hour hand, minute hand and small seconds hand), 24-hour hand

Basic watch with three hands (Hour hand, minute hand and small seconds hand)

Date display

Stopwatch hand (1/5-second and minute hands)

Stopwatch hand (1/5-second, minute and hour hands)

2. Frequency of crystal oscillator

32,768 Hz (Hz= Hertz, cycles per second)

3. Loss/gain (Monthly rate)

Monthly average loss/gain ±15 seconds (If worn on the wrist in a temperature range of 5°C to 35°C)

4. Operational temperature range

-5°C ~ +50°C

5. Driving system

Step Motor, 2 pieces

6. Battery

SB-A4 (SR936SW)

7. Battery life

Approximately 3 years (when stopwatch is used for hour a day)

8. IC (Integrated Circuit)

Oscillation, division, drive: C-MOS IC (1)