Crafted entirely in the manufacture's Grand Com-
plication workshops and featuring the prestigious
Patek Philippe Seal, the self-winding caliber 240 Q
movement is composed of 275 parts yet stands apart
with its ultra-thin 3.88-mm profile. This is possible
because of an off-center mini-rotor in 22K gold and
the ingenious arrangement of the perpetual calen-
dar and moon-phase mechanisms. With its 48-month
(four-year) cam, the perpetual calendar automatically
displays the correct date, taking into account months
with 31, 30 and 28 days, as well as February 29 in
leap years. It does not have to be corrected until
2100 – a secular year when the Gregorian calendar
will omit February 29. All calendar indications can
easily be corrected via four push pieces recessed in
the side of the case.
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