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

[WTS] Ultra Rare Zenith El Primero Tourbillon Chronograph 18K White Gold Collector Set - JUST 50 MADE!

Ultra Rare Zenith El Primero Tourbillon Chronograph 18K White Gold Collector Set - JUST 50 MADE!

Zenith - 65.1260.4005/21.C505 · $20,500
The Zenith El Primero Tourbillon Chronograph is a limited edition of just 50 made in full 18 karat white gold, featuring an automatic chronograph cal 4005 and a beautiful black dial highlighting the incredible tourbillon.

  • Condition: Really clean condition, including the sapphire crystal
  • Case Diameter: 45MM
  • Movement: El Primero automatic chronograph cal 4005
Posted at
May 17, 2026, 11:12 PM
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[WTS] Zenith El Primero Chronomaster Open Gold Bezel/Two-Tone Complete Set 2022

Zenith El Primero Chronomaster Open Gold Bezel/Two-Tone Complete Set 2022

Zenith - 51.2080.4061/69.C494 · $6,996
This Zenith Chronomaster El Primero Open features a two-tone stainless steel and 18k rose gold design, silver sunray dial, open-heart display, and blue chronograph accents.

  • Movement: El Primero 4061 column-wheel chronograph
  • Material: Stainless Steel, 18k Rose Gold
  • Dial: Silver sunray
Posted at
May 17, 2026, 6:24 PM
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[WTS] Zenith El Primero Vintage Rainbow Chronograph White Dial 40mm Box & Papers

Zenith El Primero Vintage Rainbow Chronograph White Dial 40mm Box & Papers

Zenith - El Primero Rainbow Chronograph · $3,950
The Zenith El Primero Rainbow Chronograph is a distinctive and historically significant chronograph that showcases the legendary El Primero movement in a bold and sporty design.

  • Condition: Great original condition for its age with typical signs of wear in the metals and fine hairlines in the crystal visible in harsh light under certain angles.
  • Size: 40mm diameter
  • Water resistance: 100m depth rating
  • Movement power reserve: ~50 hours
Posted at
May 17, 2026, 2:14 PM
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[WTS] Zenith Chronomaster. El Primero. Power Reserve. Open Heart. OEM Strap, OEM Deployant Clasp...

Zenith Chronomaster. El Primero. Power Reserve. Open Heart. OEM Strap, OEM Deployant Clasp...

Zenith - Chronomaster El Primero Power Reserve Open Heart · $3,295
A Zenith Chronomaster with an El Primero movement, power reserve, and open heart display is being sold.

  • Straps: OEM Strap
  • Clasp: OEM Deployant Clasp
Posted at
May 16, 2026, 1:18 PM
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[WTS] Zenith Tipo CP-2 Chronograph 03.2240.4069, Underrated El Primero Beast (641/1000)

Zenith Tipo CP-2 Chronograph 03.2240.4069, Underrated El Primero Beast (641/1000)

Zenith - 03.2240.4069
Zenith Tipo CP-2 Chronograph 03.2240.4069 is an underrated El Primero beast, one of only 641 pieces produced out of 1000.

  • Condition: Underrated
Posted at
May 15, 2026, 9:21 PM
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[WTS] Brand New 2025 Zenith Chronomaster Original El Primero Chronograph Reverse Panda | 03.3200.3600/21.C903 | Price reduced

Brand New 2025 Zenith Chronomaster Original El Primero Chronograph Reverse Panda | 03.3200.3600/21.C903 | Price reduced

Zenith - 03.3200.3600/21.C903 · $6,800
A brand new, discontinued Zenith Chronomaster Original Reverse Panda chronograph watch, still in its original packaging and with a full 2-year warranty.

  • Condition: Brand new, never used
  • Material: leather
  • Strap size: unknown
  • Warranty duration: 2 years
Posted at
May 14, 2026, 11:52 AM
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[WTS] Zenith Defy El Primero 21 • Titanium • Skeleton • Full Set • Serviced

Zenith Defy El Primero 21 • Titanium • Skeleton • Full Set • Serviced

Zenith - Defy El Primero 21
This listing is about a Zenith Defy El Primero 21 watch with a titanium case, skeleton design, and full set. It has been serviced.

  • Condition: Full set
  • Material: titanium
  • Movement: El Primero 21
Posted at
May 14, 2026, 10:03 AM
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[WTS][US] Zenith El Primero Chronomaster Sport - White Dial - 41mm - 03.3100.3600/69.M3100 - Full Set

[US] Zenith El Primero Chronomaster Sport - White Dial - 41mm - 03.3100.3600/69.M3100 - Full Set

Zenith - 03.3100.3600/69.M3100 · $7,500
Up for sale is a Zenith El Primero Chronomaster Sport - White Dial - 41mm that functions perfectly mechanically without issue.

  • Condition: Fantastic with few hairlines on clasp, case, and bracelet
  • Case size: 41mm diameter
Posted at
May 14, 2026, 7:25 AM
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[WTS] Neo Vintage French Military Zenith El Primero Flyback Chronograph Ref 02.0470.405/25 FULL COLLECTOR SET

Neo Vintage French Military Zenith El Primero Flyback Chronograph Ref 02.0470.405/25 FULL COLLECTOR SET

Zenith - 02.0470.405/25 · $4,250
This is a unique Neo Vintage French Military Zenith El Primero Flyback Chronograph, featuring a matte black dial and stainless case. The watch comes in a collector's box and papers set, including an original serialized hang tag.

  • Condition: really nice condition, with wear throughout
  • Case size: 40mm diameter
  • Bracelet length: fits up to app 7 inches
  • Movement type: automatic chronograph with quickset date winding
Posted at
May 11, 2026, 8:57 PM
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