We have always been huge admirers of master watchmaker and Friend of MrWatchMaster, François-Paul Journe. We are delighted to bring you news that marks 20-years since the launch of his Résonance wristwatch.

It was back in the mid-17th century when Dutch scientist – physicist, mathematician, astronomer and inventor – made his first observations relating to the ‘natural resonance phenomenon’. This was followed by 18th century horologists Abraham-Louis Breguet and Antide Janvier, who developed timepieces based upon this principle. Since then, François-Paul Journe is the first and only watchmaker to manufacture wristwatches that perform through acoustic resonance.

When F.P. Journe presented their first Résonance wristwatch in 2000, it was patented under the brand name Résonance®. The F.P. Journe Chronomètre à Résonance is the only wristwatch in the world that utilises natural physical resonance without any mechanical transmission phenomenon, previously known as double pendulum or double balance.

The F.P.Journe Chronomètre à Résonance: Then & Now

The new Chronomètre à Résonance has only one single barrel spring to provide power for the two movements. A differential placed on the first wheel, visible in the centre of the dial, transmits, independently, the energy of the barrel spring towards the two secondary gear trains. Each secondary gear train is equipped with a Remontoir d’Egalité of a frequency of 1 second. Working in such a way, the force received by the escapements remains linear and assures isochronism throughout 28 hours.

The Chronomètre à Résonance features a redesigned case with a crown now placed at 2 o’clock easing the winding of the watch in position 0 and the time setting in position 2, clockwise for the left dial and anti-clockwise for the right dial. The pulling of the crown at 4 o’clock simultaneously resets both seconds.

On the movement side, 2 remontoirs d’égalité (constant force device) provide a linear force to each of the two balance springs to remain isochronous during 28 hours. This model is available with a case in Platinum or in 18 K 6N Gold in 40 or 42 mm diameter. The dial is proposed in 18K white or 6N Gold with 2 hour subdials in whitened Silver Guilloché clous de Paris. Leather strap or Gold or Platinum bracelet.

Chronomètre à Résonance
Technical Specifications 

Movement:                           
Calibre 1520 in 18K rose Gold
Manual winding / 31 turns of crown

Dimensions:               
Overall diameter:                     34.60 mm 
Casing-up diameter:                34.20 mm
Overall height:                         7.97 mm
Height of winding stem:            3.39 mm
Diameter of stem thread:         S1.20 mm

Balance:                     
2 Independent linear escapements, 15 teeth
2 Independent balances with 4 inertia weights
2 Flat micro-flamed Anachron balance springs
2 Mobile stud carriers
Free sprung
2 Springs laser pinned to Nivatronic collets
2 Pinned GE studs
Frequency:       21,600v/h, 3Hz
Inertia:              10.10 mg*cm2
Angle of lift:      52°
Amplitude:        0h dial up: > 260°
24h dial up: > 260°

Main Characteristics:          
2-position winding crown at 2h
Manual winding in position 0 – Time adjustment in position 2: clockwise for the left dial and anti-clockwise for the right dial
Resetting the seconds to zero by pulling the crown at 4h

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

Total Autonomy:        
42 hours
Efficient running time 28 hours ± 2

Finishing:                   
High quality
Partial circular graining on baseplate
Geneva waves on bridges
Screw heads polished and beveled, with chamfered slots
Pegs with polished rounded ends
Steel components hand-finished

Dial:                            
18K white or 6N Gold and whitened Silver hour dials with guilloche clous de Paris

Case:                          
Platinum or 18K 6N Gold 
Diameter:           40 or 42mm
Total height:       11 mm

Number of parts:        
Movement without dial :     378
Cased up with strap:             427
Jewels:                                     62

For more information please visit https://www.fpjourne.com/en

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