[SPECIFICATION]
・
3 Hands (Hour, minute and second hand)
Movement size
・
Diameter
Outside
：
φ
27.4 mm
・
Calendar (Date: Date disk)
Casing
：
φ
27.0 mm
・
Height
：
5.25 mm
Driving system
Automatic winding with manual winding mechanism
PARTS LIST / TECHNICAL GUIDE
Cal.6R15A / 6R15B
Cal. No.
6R15A / 6R15B
Item
Date setting (counter closkwise only)
2nd click position
Time setting / Second hand stop function
Loss/
Gain
Daily rate
B25/-15 seconds per day
(worn on the wrist at temperature-range between 5
℃
and 35
℃
)
Standard rate for
measurement
6 o’clock at
the top
9 o’clock at
the top
Dial upward
Measurement (daily
rate in seconds:s/d)
±10 s/d
±15 s/d
Additional function
・
Instant date setting device
・
Second hand stop function
Crown
position
Normal position
Manual winding (clockwise only)
1st click position
Vibrations per hour
21,600 (6 beats per second)
ETACHRON system
Instantaneous rate at T0
(Fully wound condition)
Isochronous fault
Testing positions
Dial upward
Number of Jewels
±15 s/d
±
10 s/d
1/16
Lift angle of the escapement
53°
Continuous operating time
From fully wound to stoppage: Approximately 50 hours
23 Jewels
Regulation system
