Crafted entirely in the manufacture's Grand
Complication workshops and featuring the prestig-
ious 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 perpet-
ual calendar 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 cal-
endar indications can easily be corrected via four
push pieces recessed in the side of the case.
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