Calibre  J890 Chronoscope

Type:  self-winding chronoscope with column wheel system
Frequency:  4 Hz (28.800 vibrations per hour)
Diameter 28.4 mm (12.5 lines)
Height: 7.27 mm
Adjustment: excentric
Winding automatic, bi-directional (pawl winding mechanism)
Power reserve > 48 hours (excluding chronoscope function)
Display:  hours, minutes, small second at 11 o’clock, date and power reserve at 4 o’clock
Chronoscope:  central stop second, 30-minute counter at 1 o’clock, 12-hour counter at 7 o’clock
Finishing:  „Côtes de Genève“ finishing on bridges and rotor, blued screws
Jewels:  41