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Miyota 9015

Cal. 9015 AUTOMATIC & MANUAL WINDING MOVEMENT WITH DATE
 
Basic specification:
Ligne 11-1/2'''
Overall diameter Φ26.0mm
Case fitting diameter Φ25.6mm
Total height 3.90mm
Vibration frequency 28800 vibrations per hour
Jewels 24 Jewels
 
Function:
Automatic & manual winding
Display by means of hands: hour, minute, second. Date calendar
Stop second device
Shock-absorber for balance staff
 
Technical characteristics:
Balanceable weight of hands
Second hand               Max. 0.60μN ・m
Minute hand                Max. 1.25μN ・m
Hour hand                   Max. 1.50μN・m
 
Hands fitting force
Second hand                                Max. 30N
Minute hand                                 Max. 50N
Hour hand                                    Max. 50N
Lift angle                                      51°
Casing                                          Non-corresponding to "Divers' watches" defined by ISO6425
 
Time performance:
Accuracy -10~30 seconds/day
Posture difference Under 40 seconds/ day
 
Running time:
More than 42 hours
Measure the running time from full winding.
※The mainspring becomes fully winded by rotating the ratchet wheel 7.5 times (turning the crown 40 times).
 
Automatic winding structure:
Winding direction : Clockwise (seeing from case back side)                                  
 
Operating method:
Winding the mainspring, adjusting the hand, date is done by the below procedure.
 
(1) Winding the mainspring
Automatic winding watch can be also manual-winded by turning the crown in "A" position. Wind 15~20 times clockwise until second hand starts to move naturally.
 
(2) Adjusting date
Adjust the date by rotating the crown in "B" position.
* If the date is adjusted between the hours of around 8:30 PM and 2:00 AM  the date may  not change on the following day.
 
(3) Adjusting time
Rotate the crown in "C" position  and adjust the standard time. Then check if it is morning or afternoon and adjust correctly.
 
These specifications might be changed without prior notice.
CITIZEN WATCH COMPANY,LTD.