Patek Philippe 5951 Mode D'emploi page 4

Virtuosity times two
The caliber CHR 27-525 PS Q movement is a fur-
ther refinement of the CHR 27-525 PS, the world's
thinnest monopusher rattrapante chronograph
movement with column wheel control (height:
5.24 mm). It presents a classic configuration with
two column wheels and a number of technical
features such as a continuously running 60-minute
counter and new patented toothing profiles that
reduce wear and simultaneously optimize the
chronograph functions. To match the ultra-thin
construction of the chronograph mechanism,
Patek Philippe spared no effort to minimize the
thickness of the perpetual calendar module as well.
It was a formidable challenge, further complicated
by the small caliber diameter. Thus, the engineers
had to develop novel technical solutions, two of
which resulted in patent applications.
Haute Horlogerie at its Very finest
In keeping with venerable Patek Philippe tradi-
tions, the CHR 27-525 PS Q is a paragon of aesthet-
ics and craftsmanship. The bridges à l'ancienne
are meticulously finished with polished chamfers
and Geneva striping. Every caliber is individually
hand-crafted by master watchmakers in the Haute
Horlogerie workshops. Each component is indi-
vidually filed, chamfered, polished, adjusted, and
finished. Then, the watchmaker performs the so-
called repassage en blanc – a trial assembly proce-
dure – to carefully check all functions. Afterwards,
the entire movement is taken apart again, cleaned,
reassembled, lubricated, and adjusted. These an-
cestral production methods result in horological
masterpieces that exceed the expectations of even
the most discerning connoisseurs.
Casual refinement
As a tribute to its exceptional movement, the
Ref. 5951 comes in a seductive, cushion-shaped
platinum case. The sporty black dial is a textbook
example of balance and legibility spanning stand-
ard time displays, rattrapante chronograph func-
tions, and perpetual calendar indications. Red is
the color reserved for the chronograph displays; it
adds a technical accent to the contemporarily mas-
culine timepiece. The sapphire-crystal back can be
replaced with a full platinum back that is delivered
with the watch.