Zenith El Primero El Primero Chronomaster Full Open 42 Stainless Steel / Alligator

Reference 03.2081.400/78.C813

Zenith El Primero Chronomaster Full Open 42 Stainless Steel / Alligator

About this watch

The Zenith - 03.2081.400/78.C813 El Primero Chronomaster Full Open 42 is a masterpiece that combines centuries of expertise and innovation with precision and craftsmanship. Its stainless steel case, measuring 42.00 mm in diameter and 12.75 mm in height, exudes refined elegance while showcasing the intricate workings of the El Primero movement through an open case back. The skeleton dial is a visual feast for the eyes, featuring stick and dot indexes and modern-style hands that maintain a clean aesthetic. At its core lies the Zenith caliber El Primero 400B movement, renowned for its precision and boasting a frequency of 36,000 vibrations per hour. This automatic movement offers a power reserve of 50 hours, allowing it to run smoothly without frequent winding. The chronograph feature is where this watch truly shines, with a column wheel mechanism providing smooth and reliable timing capabilities. Paired with an alligator leather strap that complements the polished stainless steel perfectly, this timepiece is not only luxurious but also practical, boasting a water resistance of 100 meters.

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Key Features

Stainless Steel Case
Sapphire Crystal Glass
Automatic Movement (Zenith caliber El Primero 400B)
Chronograph Feature with Column Wheel Mechanism
Water Resistance: 100 Meters
Alligator Leather Strap
50-Hour Power Reserve

Specifications

Brand

Zenith

Family

El Primero

Model

El Primero Chronomaster Full Open 42 Stainless Steel / Alligator

Reference

03.2081.400/78.C813

Movement Features

Hours, Minutes, Small Seconds
Date
Chronograph, Column wheel

Case

Stainless Steel 42mm

Dial Color

Skeleton

Crystal

Sapphire

Water Resistance

100

Current Listings

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Zenith - 03.3114.3600 · $6,350

A Zenith Chronomaster Sport featuring a stainless steel case, blue dial, and tri-color sub-dials.

Condition: Nice preowned condition with light scratches on the case, bracelet and bezel
Case material: Stainless Steel
Case dimensions: 41mm diameter
Bezel material: Stainless Steel

Posted at

Dec 19, 2025, 8:09 PM

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Zenith Chronomaster Original Reverse Panda El Primero | 03.3200.3600/21.C903 | Brand new under full warranty | $7500 + shipping

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

A brand new Zenith Chronomaster Original Reverse Panda, discontinued by Zenith, still in its protective stickers.

Condition: Brand new, never used
Warranty: 2 years with option to extend for 3 more years
Strap material: Leather
Case size: Not specified

Posted at

Dec 17, 2025, 1:34 PM

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Zenith Chronomaster El Primero 42mm Tri-Color 03.2040.400/69 Strap & Bracelet

Zenith - Chronomaster El Primero 42mm Tri-Color · $5,350

A Zenith Chronomaster El Primero in mint condition, with a 42mm tri-color design. It comes in pristine shape and includes additional accessories such as a bracelet, box, books, warranty card, and receipt.

Condition: Mint condition
Material: Tri-color
Bracelet: Zenith
Size: 42mm

Posted at

Dec 16, 2025, 5:30 PM

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Zenith El Primero Final Edition #34/38

Zenith - El Primero Final Edition #34/38 · $11,000

A rare Zenith El Primero Final Edition, one of only 38 produced, with a unique and elegant design.

Condition: Excellent
Production Run: 1/38

Posted at

Dec 15, 2025, 3:27 PM

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Zenith El Primero Final Edition 🔴🔵⚪️

Zenith - El Primero Final Edition · $11,000

This is one of the rarest El Primero models, with only 38 produced and this being number 34/38.

Serial Number: 34/38
Extra Items: complete set including optional bracelet, 3 unused straps, inner box, outer box, travel box, warranty, booklet, authenticity, receipt

Posted at

Dec 15, 2025, 1:57 PM

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Zenith Class Sport El Primero Automatic 03.0510.400/24.M510

Zenith - 03.0510.400/24.M510 · $2,400

A Zenith Class Sport El Primero Automatic watch in excellent condition, recently serviced and owned by the seller's father.

Condition: Excellent, light desk wear on clasp
Case Size: 40mm diameter (1.6inch)
Wrist Size: 17.5cm (6.9 inch) circumference
Lugs Width: 20mm (0.8 inch)

Posted at

Dec 14, 2025, 1:37 PM

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[wtt] Zenith el primero open grande date moonphase $3499

Zenith - El Primero Open Grande Date Moonphase · $3,499

A Zenith El Primero Open Grande Date Moonphase in good condition, however the moon phase and day night disc may not be functioning correctly.

Condition: Pre-owned with minor damage (age-related scuffs)
Boxpapers: No
Complications: Chronograph, date, moon phase, day-night indicator

Posted at

Dec 13, 2025, 2:35 PM

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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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