Grande Class Traveller Open Multicity

Caliber El Primero 4037
Automatic chronograph movement with grande date
13``` caliber. Diameter : 30.50 mm. Height : 9.05 mm. 351 components.
36'000 vibrations per hour
Power reserve over 50 hours
43 jewels
Measures short time intervals to a 10th of a second
Automatic winding in both directions
Central rotor on ball bearings
22-carat gold or heavy metal oscillating weight with "Grain d'Orge" guilloché pattern

Functions Hours and minutes in the center
Small seconds-hand at 9 o'clock
Chronograph:
· Center seconds-hand
· 30-minute counter at 3 o'clock
Power Reserve indicator in the center
Grande Date over 2 o'clock with instantaneous double jump
24 Time-zone system with day/night indicator

Case Rose gold or Stainless Steel case
Stainless Steel ZENITH push buttons and crowns
Diameter : 46 mm / Diameter opening : 38 mm
Curved sapphire glass with anti-reflection treatment on both sides
Transparent sapphire case back
Water-resistance up to 50 meters

Dial Silvered "Grain d'Orge" guilloché dial.
Open dial at 10 o'clock showing the heart of El primero 4037 Caliber
Hand-mounted applique arabic numerals and indexes

Hands Faceted hands in rose gold or ruthenium

Strap Integrated handmade black alligator leather strap lined with silky Alzavel calfskin

Buckle Rose Gold or Stainless Steel triple folded buckle with ZENITH star on the cap