Thursday, August 17, 2017

Andreas Strehler Sauterelle à Heure Mondiale

Presented at Baselworld 2017, Andreas Strehler‘s Sauterelle à heure mondiale follows the footsteps of the master watchmaker’s complication watches such as Sauterelle à lune perpétuelle and Lune exacte.

In 2014, Andreas Strehler presented the Sauterelle à lune perpétuelle with phase of the moon indication with a precision of one day in 14,189 years. This is by far the most precise phase of the moon. In 2015, Andreas Strehler launched the Sauterelle à lune perpétuelle 2M with a phase of the moon indication with a deviation of one day in two million years (to be precise: 2,066,757 years), a Guinness World Record. Last year, Andreas Strehler gave us the Lune exacte with its patent pending high precision moon age indication, indicating the age of the moon correct to three hours. This indication was combined with the two million years' moon phase. After having said the final word on precise moon phase indications, Andreas Strehler this year returns to the earth with the new Sauterelle à heure mondiale.
The Sauterelle à heure mondiale, being a Sauterelle, has the patented Andreas Strehler remontoir  d'égalité at 10 o'clock.  At 8 o'clock on the dial, there is a three-dimensional view of the northern hemisphere as seen from above the North Pole, rotating counter clockwise once in 24 hours, as the earth does. This is where the phase of the moon indication used to be. This earth on the dial rotates under Andreas Strehler's familiar sapphire crystal minute ring which here indicates night on earth.

On the movement side of the watch, there is a ring with 24 names of individual cities, representing the 24 time zones. In the centre of this ring, there is a blue steel arrow.

Winding an Andreas Strehler watch is a very pleasing experience thanks to true conical gear wheels in the winding mechanism. The movement starts to work and the remontoir d'égalité coming into action, charging the escapement every second with the exact same amount of energy and indicating the seconds. Continue winding the watch until the twin mainspring barrels, linked by a differential gear, are fully wound. Due to the special Andreas Strehler stop works, limiting the mainsprings to their sector of linear energy discharge, this moment is distinctly felt.

Before your journey begins and to synchronise the watch, just turn the watch around and pull the crown to the first position. You then set the blue arrow to London/GMT. Then, while looking at the dial again, pull the crown to the second position and set the hands and the earth to the correct time for GMT, the earth serving as 24 hour and day/night indicator. GMT is now your reference time and you are ready for take-off.  With the crown pulled to the first position, the hour hand can be set in one hour-steps independently from the minute hand and without stopping the movement. 

Simultaneously, the hand in the middle of the destination-disk at the back of the movement is moved to the correct time zone, also indicating the relevant GMT offset. GMT and day/night at Greenwich always remains visible at a glance on the dial.

Technical Specifications
Caliber
Sauterelle à heure mondiale
Impulse: Double main spring barrel, energy regulated by a patented remontoir d’égalité
Plates and bridges: Central Main Plate and bridges are decorated to the highest standards; edges bevelled and polished by hand, fully decorated movement
Escapement: Andreas Strehler escapement
Regulating system: Free-Sprung balance with Breguet overcoil and four adjustment screws
Frequency: 3 Hz / 21’600 A/h Number of jewels: 25
Number of individual parts: 206
Size: 32.0 x 30.0 mm Height: 7.20 mm
Power reserve: 78 h, limited by a differential stop works

Case
Stainless steel, 41.00 x 37.30 mm (43.40 x 47.20 mm including the crown and lugs)

Dial
Silver, sapphire chapter ring
Hands: Polished blued steel

Functions
Hour, minute, small second, GMT, Destination Time
Optional: phase of the moon indication with a deviation of one day in 2 million years (blued steel disk, Moons: 18K Gold)
Winding-mechanism: Hand winding with conical gear wheels
Crown: Tree positions, 0=winding, 1=destination time (local time), 2=hand setting

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