Omega Seamaster 300 Seamaster 300 Master Chronometer Stainless Steel / Summer Blue / Bracelet

Reference 234.30.41.21.03.002

Omega Seamaster 300 Master Chronometer Stainless Steel / Summer Blue / Bracelet

About this watch

The Omega Seamaster 300 Master Chronometer 234.30.41.21.03.002 is a masterpiece of luxury watchmaking, boasting a stunning Summer Blue gradient dial that exudes freshness and vibrancy. The round case measures 41.00 mm in diameter and 13.85 mm in height, striking a perfect balance between masculinity and elegance. Crafted from high-grade stainless steel and featuring a ceramic bezel, this watch is built to withstand the rigors of underwater adventures as well as everyday wear. The sapphire crystal provides scratch resistance and clarity that's hard to beat. With its impressive 300 meters of water resistance, this timepiece is a reliable companion for serious divers and water sports enthusiasts alike. At the heart of this masterpiece lies the Omega caliber 8912, an automatic movement that ensures accuracy and reliability with a 60-hour power reserve and a frequency of 25,200 vibrations per hour. METAS-certified, it meets the highest standards of precision and performance. The mixed indexes and arrow hands ensure readability at a glance, even in low light conditions. Whether you're diving into the ocean or diving into your daily routine, this watch is a reliable companion that can handle it all.

Buy Now on Jomashop

This is an affiliate link

MSRP: $7,400

Market Price: $5,510

Key Features

Striking Summer Blue gradient dial
Robust and durable materials (stainless steel, ceramic bezel)
High water resistance (300m)
METAS-certified movement for accuracy
Versatile for both casual and formal wear

Specifications

Brand

Omega

Family

Seamaster 300

Model

Seamaster 300 Master Chronometer Stainless Steel / Summer Blue / Bracelet

Reference

234.30.41.21.03.002

Movement

8912

Movement Features

Hours, Minutes, Seconds
Chronometer, Co-Axial Escapement

Case

41mm

Dial Color

Blue

Crystal

Sapphire

Water Resistance

300

Current Listings

Iconic Diver: Omega Seamaster 300M Blue - 2025 - Unworn

Omega - 210.30.42.20.03.001 · $4,400

The Omega Seamaster Diver 300M Co-Axial Master Chronometer features a deep blue ceramic dial with laser-engraved waves, 42mm stainless steel case, and a blue ceramic bezel. It includes Omega's METAS-certified Caliber 8800 and has 300 meters of water resistance.

Condition: Unworn
Case diameter: 42mm
Water resistance: 300m
Movement: Caliber 8800

Posted at

Dec 14, 2025, 2:28 PM

Active

View listing on r/WatchExchange

OMEGA Seamaster 300M - Blue Wave Dial

OMEGA - 210.30.42.20.03.001 · $3,950

This OMEGA Seamaster Diver 300M features a blue wave dial and is part of the current-generation redesign with ceramic bezel and METAS-certified Master Chronometer movement.

Condition: Pre-owned, excellent condition with minimal handling wear
Case size: 42mm diameter
Bezel material: ceramic
Movement certification: METAS-certified Master Chronometer

Posted at

Dec 14, 2025, 11:31 AM

Active

View listing on r/WatchExchange

Omega Seamaster 300 212.30.41.20.01.003 Authenticated in Box

Omega - 212.30.41.20.01.003

Condition: Authenticated in Box
Authentication: authenticated by Omega

Posted at

Dec 12, 2025, 9:40 AM

Active

View listing on r/WatchExchange

Omega Seamaster 300m ‘Electric Blue’ 2263.80

Omega - 2263.80 · $1,599

A 36mm Omega Seamaster 300m Quartz watch with an Electric Blue finish.

Size: 36mm diameter
Material: quartz

Posted at

Dec 11, 2025, 3:03 PM

Active

View listing on r/WatchExchange

Omega Seamaster 300M Grey dial Full set 42MM

Omega - 210.32.42.20.06.001 · $3,850

A Omega Seamaster 300M with a grey dial, featuring a chronometer with date, helium escape valve, uni-rotating bezel, and transparent caseback.

Condition: Good condition
Case diameter: 42 MM
Dial color: Grey
Weight: 110 grams

Posted at

Dec 10, 2025, 7:19 PM

Active

View listing on r/WatchExchange

Omega Seamaster 300 Master Co-Axial – 41mm “Retro” – 233.30.41.21.01.001 – $3,399 Shipped

Omega - 233.30.41.21.01.001 · $3,399

This Omega Seamaster 300 Master Co-Axial features a 41mm stainless steel case, black dial with vintage-tone lume, and a ceramic bezel.

Condition: Excellent overall with light, honest wear
Case size: 41mm
Water resistance: 300m
Movement type: Cal. 8400

Posted at

Dec 7, 2025, 9:47 PM

Active

View listing on r/WatchExchange

OMEGA Seamaster 300 Black - Full Set - B&P - 8/10 Condition

OMEGA - 210.32.42.20.01.001 · $4,450

A study in stealth and sophistication featuring a laser-engraved wave-pattern dial and polished ceramic bezel in deep black. Paired with its brushed steel case and integrated bracelet, this 42mm watch delivers a powerful monochromatic statement.

Condition: 8/10, minor used handling marks on case
Case size: 42mm
Water resistance: 300m

Posted at

Dec 7, 2025, 7:50 PM

Active

View listing on r/WatchExchange

Omega Seamaster 300M Nekton 42mm 210.30.42.20.01.002 Full set

Omega - 210.30.42.20.01.002 · $4,400

Up for sale is an Omega Seamaster 300M Nekton edition 42mm, featuring a primary matte finish dial with polished waves and solid case back.

Condition: Great to excellent condition, some marks on the case and bracelet
Movement: Omega Cal. 8806, METAS certified
Water resistance: not specified
Strap: OEM Omega rubber strap (can be included in the sale for additional cost)

Posted at

Dec 7, 2025, 12:02 PM

Active

View listing on r/WatchExchange

Omega Seamaster 300M - Ref # 212.30.41.20.03.001, 2018, Box and Papers

Omega - 212.30.41.20.03.001 · $3,550

This Omega Seamaster Professional Diver 300M is a sleek 2018 model featuring a 41mm stainless steel case, blue dial, and automatic 2500 Co-Axial movement.

Condition: Very good
Case size: 41mm diameter
Material: stainless steel
Bezel type: blue ceramic uni-directional

Posted at

Dec 6, 2025, 6:01 PM

Active

View listing on r/WatchExchange