Quality Control - Patek Philippe 5270 Manual Del Usuario

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QUALITY CONTROL

The movements and completely assembled watches
are subject to a series of technical tests and visual
inspections to verify their rate accuracy, winding
speed, power reserve, reliability, water resistance,
and overall appearance. After it was assembled,
your manually wound watch will already have
run for 14 days before leaving the workshops; it
fully complies with the stringent criteria of the
Patek Philippe Seal.
RATE ACCURACY
The rate accuracy of Patek Philippe watches is
verified in several phases of manufacturing, both
with uncased and fully cased movements. The final
test is performed with a wrist motion simulator
and the results must conform to the following
Patek Philippe precision benchmarks:
The rate accuracy of calibers with a diameter of 20 mm or
larger must range within – 3 and +2 seconds per 24 hours.
The precision of a watch is determined by how
accurately it keeps the time. A watch that is fast or
slow is considered precise if the amount by which
it is fast or slow remains constant. Such a deviation
can be easily corrected. The last test of accuracy
takes place on your wrist. Your temperament or the
nature of your physical activities can cause slight
irregularities. Fluctuations in position, tempera-
ture, or air pressure, as well as vibrations and other
factors may also affect its accuracy.