Grande ChronoMaster XXT Open

Functions

New El Primero 4021 movement

Automatic chronograph movement

13```caliber. Diameter 30 mm. Height : 6.50 mm

39 jewels

36,000 vibrations per hour

Power reserve over 50 hours

Measures short time intervals to a 10^th of a second

Central rotor on ball bearings

Automatic winding in both directions

22-carat rose gold oscillating weight with “grain d’orge” guilloché pattern, or bi-metal with “Côtes de Genève” pattern. 

Case

Opened dial at 10 o’clock showing the hearth of El Primero

Hours and minutes in the center

Small seconds-hand at 9 o’clock with a 3-branched hand

Power reserve indicator at 6 o’clock

Center seconds-hand

30-minute counter at 3 o’clock

Tachometric scale on the gold version

Dials

18-carat rose gold or stainless steel

ZENITH push buttons and crown in 18-carat rose gold or stainless steel

Diameter 45 mm

Diameter opening : 35 mm

Curved sapphire glass with anti-reflection treatment on both sides

Transparent sapphire case back

Water-resistant up to 30 meters

Hands

Silvered with “grain d’orge” guilloché pattern, or powdered black dial

18-carat rose gold or rhodium hand-mounted applique roman numerals

Strap

18-carat rose gold or rhodium faceted hands

Power reserve hand : ruthenium on gold version, yellow gold on steel version

Buckle

Black alligator leather strap, hand-stitched tone-in-tone, lined with silky Alzavel calfskin.

18-carat rose gold or stainless steel ChronoMaster triple folding buckle stamped with the historical ZENITH star on the cap