THIS SECTION EXPLAINS THE DIFFERENT PIERRE DEROCHE COMPLICATIONS AND IN WHICH WATCHES YOU WILL FIND THEM.
SECOND TIME ZONE - GMT
The GMT is used for watches which have an additional time-zone dial showing the exact time of a city in another time zone, which doesn’t necessarily need to be Greenwich Mean Time.
TNT GMT Half-Hour, TNT GMT Power Reserve 43, GrandCliff GMT Power Reserve
POWER RESERVE INDICATOR
A useful add-on for all manual or automatic winding watches, the power reserve indicator shows how long the watch will continue to work without being wound up.
TNT Royal Retro Power Reserve, TNT GMT Power Reserve 43, Grandcliff Annual Calendar Power Reserve, GrandCliff GMT Power Reserve, GrandCliff Pure Mother of Pearl
CALENDAR, LARGE DATE, SMALL DATE, MEDIUM DATE
Watches with a simple calendar show the date but do not adjust automatically to take account of the number of days in a month.
They require to be manually adjusted five times a year.
All Pierre DeRoche watches have a calendar.
ANNUAL CALENDAR WITH LARGE DATE AND MONTH
Simple annual calendar which automatically adjusts according to the number of days in a month, with the exception of February and leap years.
GrandCliff Annual Calendar Power Reserve.
CHRONOGRAPH WITH 60 MINUTE COUNTER
A mechanical chronograph with analogue display (hour, minute and second hands) can measure a specific period of time.
Measured time is generally displayed by a “chronograph” second hand in the centre of the dial, a minute hand (and a separate counter) and an hour hand (and separate counter).
Measured time is read by combining three readings located in three different places.
TNT Chrono 43, TNT Penta, GrandCliff Countdown, Grandcliff Milady, GrandCliff Annual Calendar Power Reserve, GrandCliff Retro Hours & Flyback, GrandCliff Retro Hours, toute la collection Splitrock.
CHRONOGRAPH WITH FLYBACK FUNCTION
The flyback function allows you to relaunch the stopwatch when it is already in operation by simply pressing the re-set button (generally at 4 o’clock). There is no need to press the first button (at 2 o’clock) first to stop the hands.
TNT Penta, GrandCliff Retro Hours & Flyback, GrandCliff Countdown, GrandCliff Annual Calendar Power Reserve
CHRONOGRAPH WITH RETROGRADE 60 MINUTE AND 6 OR 12 HOUR COUNTERS
On what are called retrograde displays, the hands trace a semi-circle before immediately returning to their initial position to start the process again. This constant back and forward movement of the hands makes for original, truly spectacular dials.
Grandcliff Retro Hours, GrandCliff Retro Hours & Flyback, Grandcliff Annual Calendar Power Reserve
CHRONOGRAPH WITH 3 CONCENTRIC HANDS
The classic chronograph but with the hours, minutes and seconds displayed on the same counter.
Pierre DeRoche was the first manufacturer to offer this complication.
SplitRock MDA, SplitRock Big Numbers
CHRONOGRAPH WITH COUNTDOWN FUNCTION
The countdown function shows the time remaining before an event.
On what are called retrograde displays, the hands trace a semi-circle before immediately returning to their initial position to start the process again. This constant backward and forward movement (6 x 10 seconds) of the hands makes for original, truly spectacular dials.
TNT Roya Retro, TNT Roya Retro Gold , TNT Roya Retro Power Reserve, TNT Half-Hour, TNT Roya Retro 43, TNT Royal Retro 43 Bonnie & Clyde, GrandCliff Mylady Royal Retro
RENDEZVOUS FUNCTION WITH A 2-GONG MECHANISM
The RendezVous (appointments) function is an alarm with a beautiful chime; it’s not designed to wake you up. The mechanism takes its inspiration from the prestigious minute repeater watches; two hammers hit two different-sized superimposed gongs simultaneously, emitting a gentle sound which alternates between high and low. They are cathedral gongs, i.e. each one turns more than 360°. The shorter hammer emits a high sound and the longer hammer a low sound. The latter is visible on the dial.
TNT RendezVous, GrandCliff Countdown
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