Pierre DeRoche PDR 4001 Mode D'emploi page 9

c
h r o n o g r a p h w a t c h
A mechanical chronograph watch with analog display
(indication of the hours, minutes and seconds using
hands) also comprises a mechanism capable of meas-
uring a time.
The time counted off is generally displayed by means of
a "chronograph" seconds hand placed in the centre of
the dial, a minute hand (and separate counter), as well
as an hour hand (and separate counter).
The measured time is read off by integrating these three
items of information, located in three different places.
c
a l i b r e s
Calibres PDR 4001 and 4002 integrate the three
above-mentioned items of information on a single
counter thanks to a display using three concentric hour,
minute and seconds hands.
This ingenious mechanism enables intuitive and instant
read-off which is also much faster and simpler than on
conventional chronographs.
In addition to the chronograph functions, calibres PDR
4001 and 4002 also indicate the hours, minutes and
seconds, along with the date.
p d r 4 0 0 1 / 4 0 0 2