GP 新出了款大机芯。版主评价一下啊~
GP4500, self-winding mechanical movement
Diameter of fitting : 30.00 mm
Calibre : 13 _''' (lignes)
Thickness : 3.95 mm
Jewels : 27
Frequency : 28,800 vibrations/hour (4 Hz)
Power reserve : minimum 56 hours
Number of parts :190
Functions: hours, minutes
centre or small seconds at 9 or 10 o'clock with stop seconds
date
Unidirectional winding rotor with ceramic ball bearing
Double third wheel
3 positions winding stem
Fine index adjuster