20 Years of the Chronomètre à Résonance

20 Years of history is not something every watch model gets a chance to celebrate.  But then again, the Chronomètre à Résonance is not just any watch model.  It has come to symbolize the life's work of François-Paul Journe and the brand that bears his name, F.P. Journe.

Courtesy of F.P. Journe

This version has the usual 12 hour scale on the right hand, but on the left the time is measured and indicated on a 24 hour scale.

Courtesy of F.P. Journe

Available in platinum (above) or 18k rose gold. 

Here are the pertinents -

CHRONOMETRE A RESONANCE
Technical Specifications 

Movement:
Calibre 1499.3 in 18K rose Gold Manual winding / 27 turns of crown

Dimensions:
Overall diameter: 32.60 mm
Casing-up diameter: 32.00 mm
Overall height: 4.20 mm
Height of winding stem: 2.59 mm

Balance:
2 flat microflamed Anachron balance spring
2 mobile stud carriers
2 free sprung balance springs
2 spring laser pinned to Nivatronic collets
Pinned GE studs
Reset to zero button for seconds
Frequency: 21,600v/h, 3Hz
Inertia: 10.10 mg/cm2
Angle of lift: 52°
Amplitude:
Amplitude: 0h dial up: > 320°
24h dial up: > 270°

Main Characteristics:
2 independent linear escapements, 15 teeth
2 independent balances with 4 inertia weights
2 position winding crown
Correction of the hour at 12h: for left dial by winding crown in one direction, and in the opposite direction for right dial
Resetting of the seconds by pulling the button at 4h

Indications:
Double display:
Left analog - indicating 24 hours
Right analog - indicating 12 hours
2 small seconds at 6h
Power reserve at 11h

Power Reserve:
40 hours ± 2 

Case:
Platinum or 18K 6N Gold
Diameter: 40.00 mm
Total height: 9.00 mm

Dial:
18K white or 6N Gold and white Silver guilloche counters