Omega Seamaster Diver 300m Seamaster Diver 300M Master Co-Axial 42 Stainless Steel / Sedna Gold / Blue / Bracelet

Reference 210.20.42.20.03.002

Omega Seamaster Diver 300M Master Co-Axial 42 Stainless Steel / Sedna Gold / Blue / Bracelet

About this watch

The Omega Seamaster Diver 300M Master Co-Axial 42 is an exceptional watch that successfully merges style, functionality, and durability. Its stunning blue dial with Sedna gold accents is reminiscent of the deep ocean, while its robust stainless steel case and ceramic bezel provide a durable and scratch-resistant exterior. At the heart of this luxury timepiece lies the Omega caliber 8800, a self-winding movement featuring a Co-Axial escapement that increases accuracy and reduces friction. With a power reserve of 55 hours, Master Chronometer certification, and resistance to magnetic fields up to 15,000 gauss, this watch is both precise and reliable. The Seamaster Diver 300M boasts an impressive water resistance of 300m, making it perfect for diving or everyday wear. Whether you're an avid diver or simply appreciate fine craftsmanship, this watch is sure to impress with its versatility, style, and luxury appeal.
Buy Now on Jomashop
This is an affiliate link
MSRP: $12,700
Market Price: $7,610

Key Features

  • 42mm Stainless Steel Case
  • Sapphire Crystal Glass
  • 300m Water Resistance
  • Master Chronometer Certification
  • Omega Caliber 8800 Movement
  • Co-Axial Escapement
  • 55-Hour Power Reserve

Specifications

Brand
Omega
Family
Seamaster Diver 300m
Model
Seamaster Diver 300M Master Co-Axial 42 Stainless Steel / Sedna Gold / Blue / Bracelet
Reference
210.20.42.20.03.002
Movement
8800
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Chronometer, Co-Axial Escapement
Case
42mm
Dial Color
Blue
Crystal
Sapphire
Water Resistance
300

Current Listings

[WTS] Omega Seamaster SMP300 - Blue Dial - Sedna Gold - 42mm - 210.20.42.20.03.002 - Full Set

Omega Seamaster SMP300 - Blue Dial - Sedna Gold - 42mm - 210.20.42.20.03.002 - Full Set

Omega - 210.20.42.20.03.002 路 $7,250
This Omega Seamaster SMP300 features a blue dial and Sedna gold case, measuring 42mm in diameter.

  • Condition: Fantastic condition with minor hairlines
  • Size: 42mm diameter
Posted at
Feb 15, 2026, 9:38 AM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster SMP300 - Blue Dial - Sedna Gold - 42mm - 210.20.42.20.03.002 - Full Set

Omega Seamaster SMP300 - Blue Dial - Sedna Gold - 42mm - 210.20.42.20.03.002 - Full Set

Omega - 210.20.42.20.03.002 路 $7,300
This Omega Seamaster SMP300 features a blue dial and Sedna gold case, measuring 42mm in diameter.

  • Condition: Fantastic condition with minor hairlines
  • Case Size: 42mm
  • Material: Sedna Gold
Posted at
Feb 8, 2026, 9:50 AM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Diver 300M Grey Dial on Blue Rubber Full Box & Papers Complete Set

Omega Seamaster Diver 300M Grey Dial on Blue Rubber Full Box & Papers Complete Set

Omega - 210.32.42.20.06.001 路 $4,200
The Omega Seamaster Diver 300M features a grey dial and comes with a blue rubber strap, full box, and papers.

  • Condition: Very good, retail ready
  • Box And Papers: full set including outer & inner box, all 3 cards, and an Omega travel bag
  • Included Accessories: blue rubber strap
Posted at
Feb 18, 2026, 9:43 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Diver 300M White Dial 42mm Co-Axial Master Chronometer

Omega Seamaster Diver 300M White Dial 42mm Co-Axial Master Chronometer

Omega - Diver 300M
Posted at
Feb 18, 2026, 7:32 PM
Active
View listing on r/WatchExchange
[WTS] OMEGA Seamaster Diver 300M "Paris 2024" Ref. 522.21.42.20.04.001 + Five Stripes "Paris 2024" NATO Strap - ULTIMATE SET! 馃敟$7,900馃敟

OMEGA Seamaster Diver 300M "Paris 2024" Ref. 522.21.42.20.04.001 + Five Stripes "Paris 2024" NATO Strap - ULTIMATE SET! 馃敟$7,900馃敟

OMEGA - 522.21.42.20.04.001 路 $7,900
The Seamaster Diver 300M 'Paris 2024' features a 42mm case combining stainless steel with 18K Moonshine Gold, a laser-structured diving scale, and a matte-finished white ceramic dial. It's powered by the Calibre 8800 Master Chronometer.

  • Condition: [UNWORN]
  • Case material: stainless steel and 18K Moonshine Gold
  • Diameter: 42mm
  • Movement: Calibre 8800 Master Chronometer
Posted at
Feb 17, 2026, 10:56 PM
Active
View listing on r/WatchExchange
[WTS] 2021 Omega Seamaster Diver 300M 42mm Titanium Bond NTTD 210.92.42.20.01.001 Full Set

2021 Omega Seamaster Diver 300M 42mm Titanium Bond NTTD 210.92.42.20.01.001 Full Set

Omega - 210.92.42.20.01.001 路 $7,500
2021 Omega Seamaster Diver 300M 42mm Titanium watch from the No Time To Die 007 Edition, featuring a brown tropical aluminium dial and rotating dive bezel.

  • Condition: Nice preowned condition with light scratches on the case, bezel and bracelet
  • Case dimensions: 42mm diameter
  • Band material: Titanium Mesh Bracelet and Unused Bond Nato Strap
  • Max wrist size: 8.25 in.
Posted at
Feb 17, 2026, 8:22 PM
Active
View listing on r/WatchExchange
[WTS] 2024 Omega Seamaster Diver 300M Blue James Bond 60th 210.30.42.20.03.002 Full Set

2024 Omega Seamaster Diver 300M Blue James Bond 60th 210.30.42.20.03.002 Full Set

Omega - 210.30.42.20.03.002 路 $7,225
The Omega Seamaster Diver 300M Blue James Bond 60th is a stainless steel diver's watch featuring a 42mm case, blue anodized aluminium dial, and rotating dive bezel.

  • Condition: Very nice pre-owned condition with some very light scratches on the case, bracelet and buckle.
  • Case material: Stainless Steel
  • Case dimensions: 42mm diameter
  • Bezel material: Stainless Steel
Posted at
Feb 17, 2026, 8:19 PM
Active
View listing on r/WatchExchange
[WTS] 2018 Omega Seamaster Diver 300m Black Dial Steel No Wave 212.30.41.20.01.003 B+P

2018 Omega Seamaster Diver 300m Black Dial Steel No Wave 212.30.41.20.01.003 B+P

Omega - 212.30.41.20.01.003 路 $3,600
The Omega Seamaster Diver 300M features a classic sharp black dial and a 41mm stainless steel case with a Coaxial 2500 automatic self-winding movement.

  • Condition: Great, very little signs of wear
  • Case diameter: 41mm
  • Crystal: Sapphire
  • Bracelet material: Stainless Steel
Posted at
Feb 17, 2026, 12:55 PM
Active
View listing on r/WatchExchange
[WTS] Omega Seamaster Diver 300M 42mm Black Wave Dial (210.30.42.20.01.001) 2023

Omega Seamaster Diver 300M 42mm Black Wave Dial (210.30.42.20.01.001) 2023

Omega - 210.30.42.20.01.001 路 $4,350
The Omega Seamaster Diver 300M is a 2023 model with a black wave dial, available in 42mm. The watch includes a full set of accessories and an OEM Omega blue rubber deployment bracelet.

  • Condition: excellent condition
  • Bracelet length: all links
  • Included accessories: outer box, inner box, warranty card, Master Chronometer card, pictograms card, card holder, manuals, hang tag
  • Additional bracelet: OEM Omega blue rubber deployment bracelet (previously purchased preowned for $700)
Posted at
Feb 15, 2026, 9:42 PM
Active
View listing on r/WatchExchange