[SPECIFICATION]
Day setting
Difference is under 45 seconds within max value and min value.
* Measurement should be done within 10~60 minutes after fully wound up.
* Direction of 4 positions.
(1) 12 o'clock up (2) 9 o'clock up (3) 6 o'clock up (4) 3 o'clock up
Isochronisms
(24h-0h)
-10~+20 seconds per day.
* Direction of position. : Dial up
* Difference of static accuracy of 24h and 0h
Duration time
More than 45 hours … Mainspring after fully wound up.
* Posture to confirmation : Dial up
Normal position
20 seconds
* Equipment to be used : Witschi WATCH EXPERT
Posture
difference
Manual winding
Automatic winding with ball bearing
Stop second device
Quick day-date correction
<< Movements >>
䞉
Fully wound up by turning the crown minimum 55 times.
䞉
Fully wound up by turning the ratchet wheel screw 8 times.
<< Complete Watch >>
A winding machine is needed to wind up the mainspring.
Full wind up conditions
䞉
Rotary speed : 30 rpm
䞉
Operating time: 60 minutes
Crown
position
Counterclockwise
Clockwise
-15~+25 seconds per day
* Measurement should be done within 10~60 minutes after fully wound up.
* All measurements are made without the calendar in function.
Measurement
position
Direction of 3 positions. (1) Dial up (2) 9 o'clock up (3) 6 o'clock up
Lift angle
52 deg.
Free
Manual winding
Date setting
PARTS CATALOGUE / TECHNICAL GUIDE
Cal.NE20C
Version-03
Cal. No.
Measurement
time
Time indication
Basic function
3 Hands ( Hour , Minute , Second )
Day-date calendar hands
Power reserve hand
Ф
27.40mm
Casing diameter
Ф
27.00mm
Total height
Frequency
28,800 vibrations per hour
Accuracy
SII Products
1
Item
NE20C
Second click
Time setting
Time setting
Movement
Movement
䚷䚷䚷䚷
size
Outside diameter
Winding the mainspring
Static accuracy
6.15 mm
First click
Jewels
29 jewels
