Zenith El Primero El Primero Chronomaster Full Open 38 Stainless Steel / Alligator
Reference 03.2153.400/78.C813
About this watch
The Zenith El Primero Chronomaster Full Open 38 is a masterpiece that combines elegance with cutting-edge technology. Its skeletonized dial reveals the intricate workings of the movement, showcasing the craftsmanship and adding a unique flair. The watch is encased in stainless steel, known for its durability and resistance to tarnishing, with a 42 mm diameter striking a balance between boldness and wearability. The El Primero 400 movement boasts a frequency of 36,000 vibrations per hour (VpH), offering unparalleled accuracy and precision. With a power reserve of 50 hours, the watch is powered by an automatic marvel that adds practicality to its elegance. A luxurious alligator leather strap complements the timepiece, enhancing its elegance and providing comfort throughout the day.
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Key Features
- Skeletonized dial with 278 movement components
- Stainless steel case with 42 mm diameter and 12.75 mm height
- Sapphire glass for scratch resistance
- 100 meters water resistance for daily wear
- El Primero 400 automatic movement with 50 hour power reserve
- Chronograph function for measuring elapsed time
- Luxurious alligator leather strap for comfort and style
Specifications
- Brand
- Zenith
- Family
- El Primero
- Model
- El Primero Chronomaster Full Open 38 Stainless Steel / Alligator
- Reference
- 03.2153.400/78.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] Zenith Defy Skyline El Primero Chronograph 42mm Silver Dial 03.9500.3600 Full Set](https://preview.redd.it/ym521r4ih05f1.jpg?width=640&crop=smart&auto=webp&s=aabc9c3ae9a862a73f7139ad4daa63573d6e066d)
Zenith Defy Skyline El Primero Chronograph 42mm Silver Dial 03.9500.3600 Full Set
42mm Zenith Defy Skyline El Primero Chronograph with silver dial, stainless steel case, and 1/10th of a second chronograph function.
- Condition: has some light scratches on bezel and bracelet
- Case size: 42mm
- Dial color: silver
2025 Zenith El Primero Chronomaster Open Men’s Watch – 03.3300.3604/69.M3300
The Zenith Chronomaster Open brings high-performance horology to the forefront with a perfect blend of iconic design and cutting-edge movement.
- Condition: New and Unworn
- Case size: 39.5mm diameter
- Case material: Stainless Steel
- Bezel: Fixed, polished stainless steel
![[WTS][US] Zenith Defy El Primero 21 Ultra Blue - 44mm - 97.9001.9004/81.R946 - Full Set](https://preview.redd.it/q4ez52577i4f1.jpg?width=640&crop=smart&auto=webp&s=18681dd897bea41bb959a23eda86045ad9517345)
[US] Zenith Defy El Primero 21 Ultra Blue - 44mm - 97.9001.9004/81.R946 - Full Set
Up for sale is a Zenith Defy El Primero 21 Ultra Blue - 44mm, which functions perfectly mechanically without issue.
- Condition: Fantastic, no hairlines on clasp or case
- Case size: 44mm diameter
![[WTS] Zenith El Primero 03.2522.400/69.r576](https://preview.redd.it/gd768az5gd4f1.jpg?width=640&crop=smart&auto=webp&s=97539dc9952eab91412415e79c12bf5b1bfc0389)
Zenith El Primero 03.2522.400/69.r576
El Primero Skeleton in 45mm case, functions as expected with slight reset issue and full kit included
- Condition: Pre-owned with noted functional issue (chronograph resets before 12)
- Case size: 45mm diameter
- Functions: chronograph
![[WTS] Zenith El Primero Skeleton](https://preview.redd.it/cbvep1vdac4f1.jpg?width=640&crop=smart&auto=webp&s=3f0e156bf4c1fc0a11d355cf08b70da0aba4ab50)
Zenith El Primero Skeleton
This Zenith El Primero Skeleton is a striking 45.5mm chronograph with an openworked dial that reveals the high-beat El Primero 400 B movement beneath.
- Condition: Like new, unworn
- Case size: 45.5mm diameter
- Movement: El Primero 400 B

>>REDUCED FURTHER<< ZENITH DEFY EL PRIMERO LAND ROVER CHRONOGRAPH LIMITED EDITION
The 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 an in-house El Primero movement measuring time to 1/100 second. It's part of the limited edition series of 250 pieces with Land Rover Defender.
- Condition: MINT
- Case diameter: 44mm
- Movement: in house El Primero
![[WTS] Zenith Chronomaster El Primero 42mm Chronograph 2020 BOXES/PAPERS!](https://preview.redd.it/gixmfm1e2z3f1.jpg?width=640&crop=smart&auto=webp&s=536574e5ff7b4e0c25b099ae32cba4e8e7b155d7)
Zenith Chronomaster El Primero 42mm Chronograph 2020 BOXES/PAPERS!
The Zenith Chronomaster El Primero is a 42mm chronograph watch featuring a 36,600 vph movement and silver dial with tri-colored sub-dials.
- Condition: Pre-owned with minimal cosmetic wear
- Case diameter: 42mm
- Water resistance: 100m
- Movement frequency: 36,600 vph
[FS] Zenith Defy El Primero 21 Skeleton Dial 49.9000.9004/78.R782 – Ceramic Mens Watch Full Set
A split second time stopping 44mm chronograph housed in a bold black ceramic case with a skeletonized dial that puts its dual-escapement architecture on full display.
- Condition: Excellent
- Movement: El Primero 9004 Automatic Chronograph
- Power reserve: 50 Hours (Time) / 50 Minutes (Chronograph)
- Frequency: 5Hz (Time) / 50Hz (Chronograph escapement)

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