To house the first automatic chronograph calibre ever created by its manufacture, Jaeger-LeCoultre has chosen the robust and very sporty Master Compressor line. Everything has been done in this new movement to optimize reliability, sturdiness, and shock resistance.
The new automatic chronograph movement (751 and 752 respectively) features 28,800 vibrations per hour driven by a column wheel escapement, and a working reserve of 72 hours thanks to its double barrel.
Because of the vertical coupling in place of the usual lateral device, the seconds hand starts instantaneously with no vacillation. In case of shock, the vertical coupling does not cause any undesirable time variations.








The long-term reliability is reinforced by the winding bearing, whose ball-bearings are made of ceramic and thus require no lubrication. Offering additional protection against shocks, the inertia of the large balance is regulated by four adjustable screws on the felloe of the balance and the spiral is soldered by laser.
On the technical side, the compression keys
of the preceding models of the Master Compressor line have been replaced by compression pushbuttons, which avoids all unintentional manoeuvres.
This exceptionally resistant movement requires a case of the same quality. To avoid shocks and vibrations passing to the movement, the titanium case of the Master Compressor Extreme World Chronograph has a revolutionary system of shock absorption.
In addition to showing the hours and minutes, this powerfully designed watch with contrasting lines of colour displays chronographic functions, a power reserve indicator, and a large date as well as the world’s time zones thanks to a disc connected to a two-armed hand that makes one rotation every 24 hours.
The red, white and black Master Compressor Chronograph provides not only chronographic functions, but also has a very readable tachymeter (which is not common for such small measurement scales) that, combined with solidity and overall hardiness of the case and movement, makes it the choice instrument for all those who are impassioned by the measure of speed.


Source: April-May 2005 Issue

More...Click here to subscribe to Europa Star Magazine.