Zenith El Primero El Primero Chronomaster Power Reserve Blue

Reference 03.2085.4021/51.C700

About this watch

The Zenith El Primero Chronomaster Power Reserve Blue is a masterpiece of watchmaking, blending tradition with modernity to create a timepiece that is both stunning and precise. Its robust stainless steel case measures 42mm in diameter, sitting comfortably on the wrist while its polished finish reflects light beautifully. The blue dial features a sunburst effect, adding a dynamic quality that changes hues as light hits it from different angles. The stick and dot indexes are minimalist yet classic, ensuring readability is never compromised. At the heart of this watch is the Zenith caliber El Primero 4021, a marvel of engineering consisting of 248 components that work in harmony. With an impressive power reserve of 50 hours, this automatic movement ensures you'll never miss a moment. The column wheel chronograph offers precision timing that is simply unmatched, while its silicon escape-wheel and lever enhance durability and reduce friction. This watch is built to withstand the elements, with a water resistance of up to 100 meters. Whether you're a seasoned collector or a newcomer to luxury timepieces, this watch deserves a place in your collection.

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Key Features

42mm stainless steel case
Blue sunburst dial with stick and dot indexes
Zenith caliber El Primero 4021 automatic movement
50-hour power reserve
Column wheel chronograph with silicon escape-wheel and lever
100m water resistance
High-quality leather strap or stainless steel bracelet option

Specifications

Brand

Zenith

Family

El Primero

Model

El Primero Chronomaster Power Reserve Blue

Reference

03.2085.4021/51.C700

Movement Features

Hours, Minutes, Small Seconds
Chronograph, Column wheel
Power Reserve Indicator

Case

Stainless Steel 42mm

Dial Color

Blue

Crystal

Sapphire

Water Resistance

100

Current Listings

Zenith El Primero “Open Heart” - Need I say more?

Zenith - 03.0520.4021 · $2,950

This Zenith El Primero 'Open Heart' features a rare white dial variant and pairs the iconic high-beat chronograph movement with an open-heart design.

Condition: Very Good
Case diameter: ~42 mm
Movement frequency: 36,000 vph
Crystal type: Sapphire

Posted at

Mar 11, 2026, 1:54 PM

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Zenith El Primero Port Royal V

Zenith - 01/02.0450.400 · $2,750

The Zenith Port Royal V El Primero features a cool design with symmetry and attention to detail, perfect for most folks due to its 40mm case diameter.

Condition: Excellent, some minor polishing imperfections on the case and bracelet
Case diameter: 40mm
Lug width: 20mm
Lug to lug length: 47mm

Posted at

Mar 9, 2026, 2:29 PM

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Zenith Defy El Primero 21 Titanium Skeleton Box & Papers

Zenith - 95.9000.9004/78.R582 · $70,000

The Zenith Defy El Primero 21 is a bold, technical watch housed in lightweight brushed titanium with an open-worked skeleton dial exposing the in-house El Primero 9004 movement. It has dual escapements, layered subdials, and red chronograph accents creating depth and mechanical drama. The blue rubber strap keeps it sporty and wearable.

Condition: Great pre-owned condition with light signs of wear
Case material: brushed titanium
Movement type: in-house El Primero 9004 movement
Dial description: open-worked skeleton dial

Posted at

Mar 9, 2026, 9:35 AM

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Brand New Zenith Chronomaster Original Reverse Panda El Primero Chronograph | 03.3200.3600/21.C903 | Full Zenith warranty | Lowest Price Online

Zenith - 03.3200.3600/21.C903 · $7,050

A brand new Zenith Chronomaster Original Reverse Panda with a discontinued model reference number and full warranty.

Condition: Brand new, never used
Case size: 44mm diameter
Warranty type: 2-year Zenith warranty

Posted at

Mar 9, 2026, 9:33 AM

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Zenith El Primero Chronomaster Poker Chip 97.G383.400/38.C881 ♦️Like New 2022♦️

Zenith - 97.G383.400/38.C881 · $8,416

This Zenith El Primero Chronomaster Poker Chip is a 2022 model, with a full set of box and papers included.

Condition: Like New
Year Of Production: 2022
Comes With: box & papers

Posted at

Mar 9, 2026, 2:20 AM

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WHOLE LOTTA GOLD! Zenith El Primero Flyback 18K Grand Chronomaster XT Collector Set!

Zenith - 35.1250.4009 · $13,850

The Zenith El Primero Flyback Chronomaster in 18k gold is a large and impressive dress watch with an incredible dial and classic design.

Condition: Mint, with wear throughout due to being 18K gold
Case size: 43MM diameter
Movement type: El Primero automatic chronograph
Dial material: Off-white with silver accents

Posted at

Mar 8, 2026, 9:34 PM

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2024 Zenith Defy Extreme Titanium Diver El Primero Sunray Blue Dial FULL BOXES & CARD SET

Zenith - 95.9601.3620/51.I301 · $7,649

This is a modern iteration of the classic Zenith El Primero Defy diver, featuring a titanium case with a funky sunray blue dial and an iconic automatic calibre 3620 movement.

Condition: Like new, just over a year old
Case diameter: 42.5mm
Movement: El Primero cal 3620 CS
Rotor description: cool rotor visible through the sapphire case back

Posted at

Mar 8, 2026, 9:30 PM

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2021 Zenith El Primero Chronomaster Sport 41mm Steel White Dial 03.3100.3600 Full Set

Zenith - 03.3100.3600/69.M3100 · $7,900

This is a 2021 Zenith El Primero Chronomaster Sport, a 41mm stainless steel watch with a white dial, featuring an automatic mechanical El Primero chronograph movement.

Condition: Preowned condition with scratches on the case and bracelet, small dings on lugs
Case material: Stainless Steel
Case dimensions: 41mm diameter
Bezel: Black Ceramic 1/10th of A Second Bezel

Posted at

Mar 6, 2026, 7:50 PM

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Zenith | 03.3200.3600/69.M3200 | El Primero | Complete Set | 2024 Year

Zenith - 03.3200.3600/69.M3200 · $7,500

A Zenith El Primero Chronomaster watch in preowned condition with a 38mm case and complete set, including 2024 year description.

Condition: Preowned, hairline scratches throughout
Case Size: 38mm

Posted at

Mar 6, 2026, 6:51 PM

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