Patek Philippe GENEVE 240 PS IRM C LU nautilus Mode D'emploi page 12

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moon-phase display. It has a three-part case with
a sapphire-crystal back, a screw-down crown, and
two correction push pieces in the side of the case
for correcting the date and the moon phase. These
correctors limit the water resistance of the watch
to 60 meters. This complicated Nautilus is pow-
ered by the famous self-winding Patek Philippe
caliber 240 PS IRM C LU movement.