Zenith El Primero El Primero Chronomaster Full Open 38 Stainless Steel / Rose Gold / Alligator
Reference 51.2151.400/78.C810
About this watch
The Zenith El Primero Chronomaster Full Open 38 is a masterpiece that combines elegance with exceptional functionality. At its core lies the Zenith caliber El Primero 400, an automatic movement boasting 36,000 vibrations per hour and 278 components. The round case measures 42.00 mm in diameter, protected by sapphire crystal, showcasing intricate details of the skeleton dial. Comfort is key, with an alligator leather strap and lug width of 21.00 mm. With a water resistance rating of 100 meters, this watch can handle everyday wear. Its versatility allows it to seamlessly transition from formal to casual settings, making it a worthy addition to any collection.
Buy Now on Jomashop
This is an affiliate link
Key Features
- Automatic movement
- 36,000 vibrations per hour
- 278 components and 31 jewels
- Sapphire crystal protection
- Water resistance up to 100 meters
- Skeleton dial design
- Alligator leather strap
Specifications
- Brand
- Zenith
- Family
- El Primero
- Model
- El Primero Chronomaster Full Open 38 Stainless Steel / Rose Gold / Alligator
- Reference
- 51.2151.400/78.C810
- Movement Features
-
- Hours, Minutes, Small Seconds
- Date
- Chronograph, Column wheel
- Case
- 42mm
- Dial Color
- Skeleton
- Crystal
- Sapphire
- Water Resistance
- 100
Current Listings

Zenith Chronomaster - El Primero - Original - Tricolor Dial - Complete
A Zenith Chronomaster Original with a tricolor dial, featuring an automatic movement and stainless steel case.
- Condition: Excellent
- Case size: 38mm diameter

Zenith 42mm El Primero Chronomaster Open Heart Stainless Steel Complete
A Zenith El Primero Chronomaster Open Heart chronograph watch with a 42mm stainless steel case, featuring a Caliber Zenith El Primero 4061 movement and a date of manufacture in October 2014.
- Condition: Mint Condition
- Case diameter: 42mm
- Movement frequency: 36,000 VPH

Zenith 42mm El Primero Chronomaster Open Heart Stainless Steel Complete
This is a Zenith El Primero Chronomaster Open Heart chronograph watch, featuring a 42mm stainless steel case and powered by the Caliber Zenith El Primero 4061 movement.
- Condition: Mint Condition with light hairline scratches
- Case diameter: 42mm
- Movement frequency: 36,000 VPH
- Power reserve: 50 hour PR
Zenith Class Sport El Primero Chronograph Black Dial Hand Wound 02.0500.420
This Zenith Class Sport El Primero Chronograph is a hand-wound mechanical watch with a black dial and stainless steel case.
- Condition: 95%
- Size: 39mm diameter
- Function: Chronograph ; date

Zenith Grande Class Open El Primero Chrono Power Reserve 03.0520.4021, Black B&P
This Zenith Grande Class Open El Primero Chronograph features an in-house movement, chronograph function, power reserve indicator, and is water resistant to 50m.
- Condition: Good condition, some wear on the strap and a small blemish on the sapphire crystal
- Movement: Automatic, in-house Zenith 4021H
- Base movement: Zenith El Primero 400
- Alternations per hour: 36,000

ZENITH CHRONOMASTER SPORT El PRIMERO YOSHIDA GREEN DIAL LIMITED EDITION 2024
The Zenith Chronomaster Sport Yoshida 'Hulk Edition' features a stainless steel case with a green ceramic bezel and dial, powered by the El Primero Caliber 3600.
- Condition: Mint, Unpolished Condition
- Limited edition: 1 of 244 pieces
- Case material: stainless steel
- Bracelet material: stainless steel

ZENITH DEFY EXRTREME DIVER EL PRIMERO 5 YEAR Warranty
The Zenith Defy El Primero Extreme Diver is a high-end diver's watch featuring a black dial with orange highlights, ceramic bezel, and 42mm diameter. It has a water resistance of 600m and comes with multiple straps and quick-change feature.
- Condition: LNIB (Like New in Box)
- Case material: Titanium
- Water resistance: 600m
- Movement: In-house El Primero movement

>>REDUCED FURTHER<< ZENITH DEFY EL PRIMERO LAND ROVER Limited Edition
This Zenith Defy El Primero 21 Land Rover Limited Edition is a unique timepiece featuring a bead blasted titanium case, dark gray dial with orange accents, and the in-house El Primero movement. It's one of only 250 pieces produced and comes with a rubber strap, original fabric strap, and various accessories.
- Condition: MINT
- Case diameter: 44mm
- Movement type: El Primero
- Limited edition: 1/250

2006 Zenith El Primero Port Royal V Ref: 03.0550.4021/21.R512 with Box and Papers
The 2006 Zenith El Primero Port Royal V is a chronograph watch featuring an excellent black dial with Arabic numerals and power reserve display, housed in a 35mm case with screw down display caseback.
- Condition: Excellent
- Case size: 35mm diameter
- Bracelet type: black rubber strap
- Clasp type: double fold clasp