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

Reference 51.2081.400/78.C810

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

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

[US] Zenith El Primero Chronomaster Sport - Meteorite Dial - 42mm - 03.3120.3600/76.M3100 - Full Set

Zenith - 03.3120.3600/76.M3100 · $13,400

This Zenith El Primero Chronomaster Sport features a Meteorite Dial and measures 42mm in diameter.

Condition: Fantastic condition, minor hairlines
Case size: 42mm
Diameter: 42mm

Posted at

Jan 13, 2026, 8:12 AM

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Brand New Zenith Chronomaster Original Reverse Panda El Primero Chronograph | 03.3200.3600/21.C903 | Full Zenith warranty | $7500 + shipping

Zenith - 03.3200.3600/21.C903 · $7,500

This brand new Zenith Chronomaster Original Reverse Panda model has been discontinued by the manufacturer and comes with a full 2-year warranty.

Condition: Brand new, never used
Case material:
Strap type: leather strap with deployant clasp
Warranty: 2-year warranty (extendable to 5 years)

Posted at

Jan 12, 2026, 6:11 PM

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Zenith El Primero ref 20.0210.415 cal 3019 PHC

Zenith - 20.0210.415 · $3,500

This Zenith El Primero features the automatic caliber 3019 PHC and a gold-plated case with mineral crystal.

Condition: Excellent working order, may need servicing
Caliber: 3019 PHC automatic
Case material: Gold-plated
Crystal type: Mineral crystal

Posted at

Jan 12, 2026, 9:53 AM

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Zenith Pilot Chronometro Tipo CP-2 Flyback – El Primero 405 - Historical Re-Issue

Zenith - 405 · $42,000

Movement: El Primero 405
Flyback: yes, flyback function

Posted at

Jan 10, 2026, 10:33 AM

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[US] Zenith El Primero Chronomaster Sport - Meteorite Dial - 42mm - 03.3120.3600/76.M3100 - Full Set

Zenith - 03.3120.3600/76.M3100 · $13,450

A Zenith El Primero Chronomaster Sport watch in excellent mechanical condition, featuring a 42mm meteorite dial.

Condition: Fantastic condition with minor hairlines
Case Size: 42mm diameter

Posted at

Jan 6, 2026, 8:33 AM

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Zenith Pilot Chronometro Tipo CP-2 Flyback – El Primero – Ref. 11.2240.405/21.C773 Aged Steel

Zenith - 11.2240.405/21.C773 · $4,350

This serious pilot chronograph is robust, purpose-built, and powered by one of the finest automatic chronograph movements ever made.

Case size: 43mm
Movement: El Primero 405 automatic flyback chronograph (5Hz)
Dial color: Matte black dial with vintage-toned lume

Posted at

Jan 3, 2026, 11:05 AM

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Zenith 42mm El Primero Chronomaster Open Heart Stainless Steel Complete

Zenith - 03.2040.4061/69.C496 · $4,950

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

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

Zenith - 03.2170.4613/01.M2170 · $4,000

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

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