Seiko 4R Series Parts List/Technical Manual

PARTS LIST / TECHNICAL GUIDE
[SPECIFICATION]
Item
・3 Hands (Hour, Minute and Second hands)
Driving system
Additional function
Crown Normal position
operation 1st click
Vibration per hour
Daily Rate
Loss/Gain
Standard rate
for measurement
Regulation system
Lift angle of the escapement
Power reserve
Continuous operating time
Number of Jewels
Automatic Cal.4R71A
Cal. No.
Automatic winding with manual winding mechanism
・Second hand stop function
21,600 (6 beats per second)
Between +45 and -35 seconds per day
(worn on the wrist at temperature range between 5°C and 35°C)
Testing positions Dial upward 6 o'clock at 9 o'clock at
Measurement
（Daily rate in
seconds：s/d）
ETACHRON system
53°
From fully wound to stoppage: Approximately 41 hours
24 Jewels
4R71A
Movement Size
・Diameter
・Height
Manual winding (clockwise only)
Time setting / Second hand stop function
Instantaneous rate at T0
（Fully would condition)
the top
± 20 s/d ± 30 s/d
1/16
Outside ： φ27.4 mm
Casing ： φ27.0 mm
： 5.32 mm
Isochronous fault
Dial upward
the top
±30 s/d
± 30 s/d