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

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Zenith - 95.9601.3620/51.I301 · $7,950

A Zenith El Primero Defy Extreme Diver with a unique blue starry sunray pattern dial and a titanium case.

Condition: Pre-owned, barely over a year old
Case size: 42.5MM diameter
Movement: El Primero cal 3620 CS automatic movement

Posted at

Jan 24, 2026, 7:53 PM

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Zenith El Primero Chronomaster Revival Panda 03.A384.400/21.C815

Zenith - 03.A384.400/21.C815 · $5,999

This is a 37mm Chronomaster Revival Panda, a limited edition model from Zenith's El Primero series, featuring a classic panda dial.

Condition: preowned clean condition with hairline scratches throughout
Crystal condition: may contain marks under strong magnification
Strap condition: worn
Case size: 37mm

Posted at

Jan 23, 2026, 6:51 AM

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The Zenith Defy Skyline Chronograph features a silver 'starry sky' dial, a 1/10th-second chronograph with a central chrono hand that makes one full lap every 10 seconds, and a versatile design with a quick-change system for the bracelet and strap.

Condition: Excellent overall Condition
Movement: Zenith El Primero 3600 (5Hz / 36,000 vph) with 1/10th-second chronograph
Case size: 42mm diameter
Bracelets/straps: Steel bracelet and green rubber strap with Zenith quick-change

Posted at

Jan 20, 2026, 7:23 PM

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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 · $13,350

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

Condition: Fantastic with minor hairlines
Case size: 42mm

Posted at

Jan 20, 2026, 7:08 AM

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Zenith 03.2522.400/69.R576 El Primero Chronomaster 45mm

Zenith - 03.2522.400/69.R576 · $4,999

This 45mm Chronomaster El Primero is a preowned Zenith watch in good condition.

Condition: preowned clean condition with minor hairline scratches throughout
Length: 45mm diameter
Case material: unknown (not specified)
Depth rating: unknown (not specified)

Posted at

Jan 19, 2026, 11:50 PM

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Zenith Defy El Primero 21 Chroma 49.9010.9004/01.R947 limited edition to 200 pieces

Zenith - 49.9010.9004/01.R947 · $10,500

This limited edition Zenith Defy El Primero 21 Chroma is one of only 200 pieces, featuring a complete set and 2022 date.

Condition: Mint condition
Year: 2022

Posted at

Jan 19, 2026, 7:19 PM

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Zenith El Primero Captain (03.2110.400) - B/P

Zenith - 03.2110.400 · $3,250

A Zenith El Primero Captain with a 42mm diameter case and El Primero 400B movement, featuring a quickset date function.

Movement: El Primero 400B
Case diameter: 42mm
Crystal: Sapphire

Posted at

Jan 17, 2026, 11:13 PM

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Zenith El Primero Defy Extreme Diver Titanium Ref 95.9601.3620/51.I301 AKA A FULL ON WRIST PARTY!

Zenith - 95.9601.3620/51.I301 · $7,950

This is a Zenith El Primero Defy Extreme Diver Titanium watch with a beautiful blue starry sunray pattern dial and a 42.5MM titanium case.

Condition: Pre-owned, mint condition
Movement: El Primero automatic cal 3620 CS
Case size: 42.5mm diameter
Straps: Original blue rubber strap and oversized cloth dive strap with Zenith buckle

Posted at

Jan 15, 2026, 8:35 PM

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RARE Zenith El Primero Chronograph 18K White Gold Yoshida Edition - JUST 15 MADE - Collector Set!

Zenith - 65.3101.3600/21.C920 · $12,850

A rare Zenith El Primero Chronograph in solid 18K white gold, produced for the Yoshida store in Tokyo and limited to just 15 examples.

Condition: Beautiful condition, some minor wear on gold bezel and case sides
Case size: 40MM
Movement type: Cal 3600 automatic movement

Posted at

Jan 14, 2026, 8:40 PM

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