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

Reference 234.30.41.21.03.002

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.
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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

[WTS] BNIB Omega Seamaster 300 ONLY $10k!

BNIB Omega Seamaster 300 ONLY $10k!

Omega - 210.60.42.20.99.001 · $10,000
This Omega Seamaster 300 is brand new and includes the entire set. The reference number is 210.60.42.20.99.001.

  • Condition: Brand new, full set
  • Rrp: $17.2k plus tax
Posted at
Apr 14, 2026, 3:57 PM
Active
[WTS] 2018 Omega Seamaster 300 Co-Axial 233.30.41.21.01.001 Full Set Excellent

2018 Omega Seamaster 300 Co-Axial 233.30.41.21.01.001 Full Set Excellent

A modern reinterpretation of the 1957 classic with vintage-inspired lume and a transparent caseback.

  • Condition: Excellent
  • Year: 2018
Posted at
Apr 14, 2026, 12:30 PM
Active
[WTS] Omega Seamaster 300M Co-Axial 41mm 2220.80 Box and Card - $2,890

Omega Seamaster 300M Co-Axial 41mm 2220.80 Box and Card - $2,890

Omega - 2220.80 · $2,890
Up for sale is my Omega Seamaster 2220.80, a 41mm automatic co-axial cal 2500 movement watch with a steel case and original Omega steel bracelet.

  • Condition: 8.9/10, great condition with minimal marks/hairlines
  • Case size: 41mm diameter
  • Movement: automatic co-axial cal 2500
  • Bracelet fit: up to 7.25 inch wrists depending on wrist shape
Posted at
Apr 14, 2026, 4:34 AM
Active
[WTS] Omega Seamaster 300M Co-Axial Mid-size 36mm 2222.80 - $2,250

Omega Seamaster 300M Co-Axial Mid-size 36mm 2222.80 - $2,250

Omega - 2222.80 · $2,250
Up for sale is my very good Omega Seamaster 2222.80, which measures at 36mm and features an automatic co-axial cal 2500 movement.

  • Condition: Very good (8.9/10)
  • Case size: 36mm
  • Bracelet length: fits up to 7-7.25 inch wrists
  • Shipping duration: 3-5 days globally
Posted at
Apr 14, 2026, 4:29 AM
Active
[WTS] Omega Seamaster 300 Blue 41mm 234.30.41.21.03.001 – Excellent Condition – Full Set – 2023

Omega Seamaster 300 Blue 41mm 234.30.41.21.03.001 – Excellent Condition – Full Set – 2023

A modern Omega Seamaster 300 in blue, presented with a stunning blue sandwich dial and matching blue ceramic bezel.

  • Condition: Excellent
  • Case size: 41mm
  • Movement: Master Co-Axial Caliber 8912
Posted at
Apr 13, 2026, 9:32 PM
Active
[WTS] Omega Seamaster 300M Tokyo Olympics Limited Edition - Full set

Omega Seamaster 300M Tokyo Olympics Limited Edition - Full set

The official watch used to keep time for the 2020 Tokyo Olympics, featuring a 42mm case with an electric blue bezel and white waved dial.

  • Condition: great pre-owned condition with very little signs of wear
  • Case size: 42mm
  • Bracelet type: sleek bracelet
Posted at
Apr 13, 2026, 7:48 PM
Active
[WTS] Omega Seamaster 300 James Bond No Time To Die NTTD 210.90.42.20.01.001 ( new / 2025 / box and papers )

Omega Seamaster 300 James Bond No Time To Die NTTD 210.90.42.20.01.001 ( new / 2025 / box and papers )

A limited edition Omega Seamaster 300 James Bond No Time To Die watch with a 42mm titanium case, available for sale complete with all original boxes and papers.

  • Condition: Brand new
  • Case size: 42mm diameter
  • Material: titanium
Posted at
Apr 13, 2026, 1:28 PM
Active
[WTS] Omega Seamaster 300M James Bond 60th Anniversary 210.30.42.20.03.002 ( new / 2025 / box and papers )

Omega Seamaster 300M James Bond 60th Anniversary 210.30.42.20.03.002 ( new / 2025 / box and papers )

This Omega Seamaster 300M is a James Bond 60th Anniversary edition, coming in a stainless steel case with the Calibre 8806.

  • Condition: Brand new
  • Case size: 42mm diameter
  • Water resistance: 300m
Posted at
Apr 13, 2026, 1:24 PM
Active
[WTS] 1968 Omega Seamaster 300 166.024 Restored (WatchCo Style)

1968 Omega Seamaster 300 166.024 Restored (WatchCo Style)

Omega - 166.024 · $6,950
A 1968 Omega Seamaster 300 Ref. 166.024 that has been restored to its original glory, featuring a striking resemblance to the Watchco Seamaster but with a better pedigree.

  • Condition: Restored
  • Bracelet: 1116 (predecessor to modern Speedmaster bracelet)
  • Water Resistance: Not water resistant
Posted at
Apr 12, 2026, 10:31 PM
Active