Patek Philippe 31-260 REG QA, Manual

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5
Your Patek Philippe Reference 5235 wristwatch
features an unusual face that clearly sets it apart
from conventional timepieces. Its regulator dial
has three separate display zones for hours, min-
utes, and seconds. The configuration combines a
subsidiary hours dial at 12 o’clock, a sweep minute
hand, and a subsidiary seconds dial at 6 o’clock; this
face was inspired by the large and highly accurate
freestanding regulator clocks once used by watch-
makers, scientific institutions, and major seaports
to keep a precise track of the time. To prevent the
hour hand from partially covering the seconds dial
twice a day for several hours, it was simply moved
aside to the periphery of the dial. The oscillator of
your Annual Calendar Regulator is nothing short of
avant-garde, featuring a Spiromax
®
balance spring
and a Pulsomax
®
escapement (the spring, lever, and
escape wheel are made of Silinvar
®
, a silicon-based
material) as innovative and patented components.
Additionally, your watch is endowed with an Annual
Calendar that only needs to be corrected once a year.