Girard-Perregaux Bridges 93505-52-233-BA6F Bruksanvisning

Girard-Perregaux Titta Bridges 93505-52-233-BA6F

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INSTRUCTION FOR USE
CONSTANT ESCAPEMENT L.M.
THE HIGH-TECH REVOLUTION IN MOTION
This true technical revolution stunned connoisseurs when prototypes of the innovative mechanism
were rst presented. Based on the ground-breaking prototypes presented in 2008, it has taken
ve years of research and development to bring this signature movement to fruition. Watchmaking
history will be forever marked by this signicant achievement in chronometry, paired with the superb
balance and singularity of this movement.
The name, in addition to being a nod to one of the Maison’s historicalgures, Constant Girard-Perre-
gaux, also refers to a holy grail in mechanical watchmaking that has perplexed watchmakers since the
dawn of time: the constant force. Keeping true to its innovative vision, the brand decided to try using
a quite novel approach to achieve it. The initials “L.M.” stand for Luigi Macaluso, who decided to trust
and promote this movement, introduced as a working prototype in 2008 and launched now as part
of the Girard-Perregaux collection.
The concept presented on that occasion in the form of a functional mechanism was breathtaking,
promising and poetic: the design was lightweight and graceful. However, the goal was far from being
the result of art for art’s sake, this was a new and convincing answer to the age-old preoccupation in
watchmaking: the precision and regularity of a mechanical watch.
To get an idea of what is at stake and truly understand the importance of this innovation, it is worth
recalling a few basic notions. The heart of a mechanical watch is ruled by the regulating organ, which
manages the flow rate of the energy received from the barrel to drive the gear train and the rotation
speed of the hands. The classic image is that of a faucet managing the flow of water.
The main factor is not so much the speed of the beats of this heart, the chosen frequency, but their
regularity. The dance can be three in a bar or four in a bar, or even a thousand; but the essential thing
is that it keeps the beat over time.
All sorts of systems had been dreamed up before the famous Swiss lever escapement was presented in
wristwatches, and became more or less standard. Yet it suffers from one drawback: it can only give back
the energy it receives from the barrel, which diminishes with time. This energy, which defines its timekeeping
accuracy, is too fast to start with, and finishes like a machine running out of steam. A curve, the curse and
the bane of watchmakers, illustrates the phenomenon: the curve of the amplitude, or angular displacement
of a sprung balance wheel or a pendulum, which lessens towards the end of the run.
The inspiration came from an experiment, which anyone can repeat by holding a business card vertically
between thumb and forefinger, bending it to form a C or an open round bracket. If you then apply pressure
from the side you will feel resistance until the moment when the card snaps to the other side to mirror its for-
mer shape, and close the round bracket. The phenomenon of instability is known as buckling, which is the
passage from a state of compression to one of bending. Spring specialists thus speak of buckled blades.

Produktspecifikationer

Varumärke: Girard-Perregaux
Kategori: Titta
Modell: Bridges 93505-52-233-BA6F

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