Zenith El Primero El Primero Chronomaster Full Open 42 Stainless Steel / Rose Gold / Strap / Alligator

Reference 51.2081.400/78.C810

About this watch

Immerse yourself in the world of luxury watches with the Zenith El Primero Chronomaster Full Open 42 (model: 51.2081.400/78.C810). This stunning piece combines sophistication with state-of-the-art technology, making it a must-have for any watch enthusiast. The combination of stainless steel and rose gold gives it a luxurious yet sporty appearance. The open dial showcases the intricate workings of the movement, inviting you to appreciate the artistry within. At the heart of this timepiece is the Zenith caliber El Primero 400B movement, boasting a frequency of 36,000 vibrations per hour for an accuracy of 1/10th of a second. This automatic movement offers range of features that make it incredibly functional, including a convenient date display and chronograph function perfect for timing events with precision. The watch is paired with a luxurious alligator leather strap that enhances its elegance while ensuring a comfortable fit on the wrist. With a water resistance of up to 100 meters, you can confidently wear this beauty while swimming or during a rainy day without worrying about water damage. Its impressive 50-hour power reserve allows it to easily keep up with your busy lifestyle.
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Key Features

  • Zenith caliber El Primero 400B movement
  • 42mm stainless steel and rose gold case
  • Sapphire crystal glass
  • 100m water resistance
  • Chronograph function with precision timing
  • Convenient date display
  • Luxurious alligator leather strap

Specifications

Brand
Zenith
Family
El Primero
Model
El Primero Chronomaster Full Open 42 Stainless Steel / Rose Gold / Strap / Alligator
Reference
51.2081.400/78.C810
Movement Features
  • Hours, Minutes, Small Seconds
  • Date
  • Chronograph, Column wheel
Case
42mm
Dial Color
Skeleton
Crystal
Sapphire
Water Resistance
100

Current Listings

[WTS] - CONUS - Zenith defy el primero 03.0526.4000 - 2950

- CONUS - Zenith defy el primero 03.0526.4000 - 2950

Zenith - 03.0526.4000 · $2,950
This Zenith Defy El Primero 03.0526.4000 is a high-end timepiece that features a sleek design and precise mechanical movement.

  • Condition: great condition
  • Box: included
  • Papers: included
  • Warranty card: temp included
Posted at
Oct 26, 2025, 10:36 AM
Active
[WTS] Zenith El Primero New Vintage 1969 Titanium Skeleton Chronograph - 40th Anniversary Limited Edition Ref.96.1969.469/77.C683 | Papers & Extra Strap

Zenith El Primero New Vintage 1969 Titanium Skeleton Chronograph - 40th Anniversary Limited Edition Ref.96.1969.469/77.C683 | Papers & Extra Strap

The Zenith El Primero New Vintage 1969 Titanium Skeleton Chronograph is a limited edition watch that pays tribute to the original A384 case design, now executed in lightweight titanium.

  • Condition: Excellent overall
  • Movement Frequency: 36,000 vph
  • Case Material: Titanium
  • Case Size: 40 mm diameter
Posted at
Oct 19, 2025, 10:01 PM
Active
Zenith 42mm El Primero Chronomaster Open Heart Stainless Steel Complete

Zenith 42mm El Primero Chronomaster Open Heart Stainless Steel Complete

A Zenith El Primero Chronomaster Open Heart chronograph watch, featuring a 42mm stainless steel case and in-house Caliber Zenith El Primero 4061 movement. The watch is dated October 2014 and has been recently serviced by Zenith.

  • Condition: Mint Condition with light hairline scratches only
  • Case size: 42mm diameter
  • Water resistance: 30m depth rating
Posted at
Mar 31, 2025, 1:26 PM
Active
Zenith El Primero Synopsis Open Heart � BOX & PAPERS � 03.2170.4613/01.M2170

Zenith El Primero Synopsis Open Heart � BOX & PAPERS � 03.2170.4613/01.M2170

A Zenith El Primero Synopsis Open Heart watch with a 40-millimeter case diameter and gold-toned hands, featuring an open heart design and classic modern architecture.

  • Condition: Excellent, little to no visible wear
  • Case Diameter: 40mm
  • Bracelet Length: 16.5 links
  • Bracket Fit: up to 7.25 inches in circumference
Posted at
Mar 27, 2025, 2:21 PM
Active
Zenith Chronomaster - El Primero - Original - Tricolor Dial - Complete

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
Posted at
Mar 27, 2025, 12:51 PM
Active
Zenith 42mm El Primero Chronomaster Open Heart Stainless Steel Complete

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
Posted at
Mar 25, 2025, 12:45 PM
Active
Zenith 42mm El Primero Chronomaster Open Heart Stainless Steel Complete

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
Posted at
Mar 4, 2025, 12:09 PM
Active
Zenith Class Sport El Primero Chronograph Black Dial Hand Wound  02.0500.420

Zenith Class Sport El Primero Chronograph Black Dial Hand Wound 02.0500.420

Zenith - 02.0500.420 · $3,120
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
Posted at
Mar 2, 2025, 5:41 AM
Active