Seiko 6R15B Parts List/Technical Manual

PARTS LIST / TECHNICAL GUIDE
[SPECIFICATION]
Item
・3 Hands (Hour, minute and second hand)
・Calendar (Date: Date disk)
Driving system
Additional function
Normal position
Crown
1st click position
position
2nd click position
Vibrations per hour
Daily rate
Loss/
Gain
Standard rate for
measurement
Regulation system
Lift angle of the escapement
Continuous operating time
Number of Jewels
Cal.6R15A / 6R15B
Cal. No.
Automatic winding with manual winding mechanism
・Instant date setting device
・Second hand stop function
Manual winding (clockwise only)
Date setting (counter closkwise only)
Time setting / Second hand stop function
21,600 (6 beats per second)
Between +25/-15 seconds per day
(worn on the wrist at temperature-range between 5℃ and 35℃)
Testing positions
Measurement (daily
rate in seconds:s/d)
ETACHRON system
53°
From fully wound to stoppage: Approximately 50 hours
23 Jewels
6R15A / 6R15B
Movement size
・Diameter Outside ： φ27.4 mm
Casing ： φ27.0 mm
・Height ： 5.25 mm
Instantaneous rate at T0
(Fully wound condition)
6 o'clock at
Dial upward
the top
±10 s/d ±15 s/d
1/16
Isochronous fault
9 o'clock at
Dial upward
the top
±10 s/d
±15 s/d