CHRONOGRAPH

Chronographs and their manufacture movements have been flagship products of A. Lange & Söhne since 1999. They make it possible to count time intervals down to the precise fifth or sixth of a second.

STOPPING WITHOUT STANDING STILL

There are always special moments in life that make people wish they could freeze time and prolong experiences of joy and elation for just a while longer. Although it is not possible to stop time and preserve such moments for eternity, Lange chronographs can measure the duration of such events and others very accurately. 


Our chronographs and their movements that were developed in-house have been icons of the manufactory since 1999. The elaborate constructions are based on the column wheel principle. Their column wheels control basic functions: start, stop and reset. Depending on the oscillator, events can be measured with an accuracy of one-fifth or one-sixth of a second and, thanks to the minute counter, can last as long as 30 minutes. 

APPLICATIONS OF THE CHRONOGRAPH FUNCTION

Chronographs can be used in many different ways. Apart from simply stopping times, they can perform additive time measurements, for instance, by sequencing several laps. For this purpose, the chronograph hands are not reset after stopping, but instead restarted. 

The outermost scale of a chronograph covers further applications. Some models feature tachometer scales. They are used to determine an average speed over a distance of one kilometre. If the watch has a pulsometer scale, it can measure a person’s heart rate.

AN ADDITIONAL HAND FOR THE RATTRAPANTE FUNCTION

“Rattrapante” is a French term that denotes the split-seconds hand of a chronograph. This additional seconds hand can be stopped independently of the chronograph hand and resynchronised with it at will.

 

Initially, both hands are directly superposed so that only the rattrapante hand is visible. When a measurement is started, both hands begin to run together and the chrono sweep-seconds hand remains concealed. It only becomes visible when measurement of the first event is stopped. At this point, the rattrapante hand stops while the chronograph hand continues to measure the elapsed time. It, too, stands still when measurement of the second event is stopped. This allows for the comparison of two time measurements with the same start time, such as the lap durations of two runners.

A further function is available if the chrono sweep-seconds hand is not stopped: Pressing a button realigns the stopped rattrapante hand with the chrono sweep-seconds hand; both hands will then run together until the rattrapante hand is stopped anew. It is a process that can be repeated any number of times. This makes it possible to measure one aggregate time and several lap times – for instance, the individual lap times of a horse in a race and its total time.

 

By cleverly combining the functions of the chronograph and rattrapante mechanism, many comparative measurements can be performed relative to a reference time. A rattrapante chronograph can even measure minima and maxima, such as the fastest or slowest of many laps.

COMPLICATIONS

OUTSIZE DATE
OUTSIZE DATE
The A. Lange & Söhne outsize date enables a date display with digits around three times as large as those in watches of comparable dimensions.
CHRONOGRAPH
CHRONOGRAPH
Chronographs and their manufacture movements have been flagship products of A. Lange & Söhne since 1999.
CALENDAR FUNCTION
CALENDAR FUNCTION
Lange models incorporate either annual calendars or perpetual calendars.
MOON-PHASE DISPLAY
MOON-PHASE DISPLAY
Most of our moon-phase displays reproduce the moon’s orbit with a precision of 99.998 per cent.
POWER-RESERVE INDICATOR
POWER-RESERVE INDICATOR
The UP/DOWN display reminds the owner to rewind the watch before it stops running.
TOURBILLON WATCHES
TOURBILLON WATCHES
The tourbillon improves the rate accuracy of a mechanical timepiece by overcoming the influence of gravity on the running of a watch.
THE FUSÉE-AND-CHAIN TRANSMISSION
THE FUSÉE-AND-CHAIN TRANSMISSION
The fusée-and-chain transmission is one of the most effective complications when it comes to increasing the rate accuracy of a mechanical watch.
CONSTANT-FORCE ESCAPEMENT
CONSTANT-FORCE ESCAPEMENT
The purpose of a constant-force escapement in a mechanical watch is to provide the escapement with a consistent flow of power, regardless of whether the watch is fully wound or nearly unwound.
CHIMING MECHANISM
CHIMING MECHANISM
Chiming mechanisms make it possible to hear the time.

EXPLORE FURTHER

FLYBACK MECHANISM
FLYBACK MECHANISM
The precisely jumping minute counter and the flyback function have been two features of Lange chronographs since 1999.
RATTRAPANTE MECHANISM
RATTRAPANTE MECHANISM
The development of the rattrapante function appeared to have ended until A. Lange & Söhne presented the DOUBLE SPLIT in 2004.
DOUBLE AND TRIPLE RATTRAPANTE MECHANISM
DOUBLE AND TRIPLE RATTRAPANTE MECHANISM
A double or triple rattrapante mechanism allows comparative or lap-time measurements of events that last as long as twelve hours.

HOW CAN WE BE OF SERVICE?

Whether you are in search of a specific model, have questions out of interest or need a service request for your timepiece – we are delighted to help you. We are at your service by phone, email or in one of our boutiques. 

The A. Lange & Söhne salon in Geneva

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