The Maîtres du Temps Chapter One Round features a world-first combination of complications. Crafted from 558 components, no other wristwatch offers a tourbillon with a mono-pusher column-wheel chronograph, retrograde date, and retrograde GMT, as well as a moon phase and day of the week on their own rolling bars. To activate all the functions, everything is operated via four dedicated pushers or a mono-pusher button located in the center of the crown. This setup makes operating the watch extremely easy to do, even with all of these complications.

Technical Specifications

Chapter One

(Ref. C1R.55.2E.22-2)

Displays
Central hands indicating hours and minutes
Central chronograph counterpoised second hand
60-minute counter at 12 o’clock
Retrograde date at 3 o’clock
Retrograde GMT at 9 o’clock
One-minute tourbillon at 6 o’clock
Day of the week indication on roller at 6 o’clock
Patented precise moon phase indication on roller at 12 o’clock

Functions
Two-position winding crown: pushed in to wind the watch; pulled out to set the time
Chronograph: start/stop/return-to-zero function activated by single pusher in the crown
Correctors
Date corrector at 2 o’clock
Day of the week corrector at 4 o’clock
Moon phase corrector at 8 o’clock]
GMT corrector at 10 o’clock
Caliber SHC02
Dimensions: 51 mm x 32 mm
Number of components: 558
Number of jewels: 58
Power reserve: 60 hours
Tourbillon rotation: 60 seconds
Balance frequency: 21,600 vph (3 Hz)

Case
18K 5N red gold
Number of components: 96
Dimensions: 62 mm x 59 mm x 22 mm
Sapphire crystals with double anti-reflective coating
Display back: sapphire crystal with anti-reflective coating
High polish and satin finishes
Correctors with integrated locking system

Dial & Hands
Number of components: 24
Multi-faceted and beveled with brushed and velvet surface finishes
Diamond-cut facet applied markers with Super-LumiNova
Red counterpoised chronograph hand
Diamond-cut facet hands for chronograph counters, hour, minute, date, and GMT
Rollers
Day roller: matte anodized Anticorodal finished aluminum
Moon phase roller: anodized Anticorodal finished aluminum inside a matte anodized cover with laser-pierced moon and stars
Window between day roller and tourbillon