Case #686 — Omega Seamaster 300 (White) Ref. 210.30.42.20.04.001

Case #686 — Omega Seamaster 300 (White) Ref. 210.30.42.20.04.001

Status: Available
Condition: Excellent Pre-Owned
Scope: Box, Papers, and Cards

Case Notes

The white-dial Seamaster Diver 300M is one of the sharpest modern executions of Omega’s signature dive watch.

The polished white ceramic dial carries the collection’s laser-engraved wave pattern, contrasted by a black ceramic bezel, black hands and indexes, and the familiar skeletonized handset. Against the stainless-steel case and bracelet, the result is bright, highly legible, and immediately recognizable without becoming flashy.

At 42 mm, it has the full presence of a modern Seamaster, while the case architecture and articulated bracelet keep it balanced on the wrist.

Inside is Omega’s Co-Axial Master Chronometer Calibre 8800, offering approximately 55 hours of power reserve, strong anti-magnetic resistance, and METAS certification.

This example dates from 2025 and presents in Excellent Pre-Owned condition. It includes its Box, Papers, and Cards and is currently sized for approximately a 7¾-inch wrist.

Because it dates from 2025, it retains substantial Omega factory warranty coverage, subject to the exact warranty-card date and Omega terms.

The Evidence

Reference: 210.30.42.20.04.001
Model: Seamaster Diver 300M
Year: 2025
Case: Stainless Steel
Case Diameter: 42 mm
Lug Width: 20 mm
Dial: White Ceramic with Laser-Engraved Wave Pattern
Crystal: Domed Sapphire with Anti-Reflective Treatment
Bezel: Black Ceramic, Unidirectional
Crown: Screw-Down
Helium Escape Valve: Yes
Caseback: Sapphire Exhibition
Movement: Omega Co-Axial Master Chronometer Calibre 8800
Movement Type: Automatic
Certification: METAS Master Chronometer
Frequency: 25,200 VPH
Power Reserve: Approximately 55 Hours
Functions: Hours, Minutes, Central Seconds, Date
Water Resistance: 300 meters / 1,000 feet
Bracelet: Stainless Steel
Bracelet Fit: Approximately 7¾-inch wrist
Condition: Excellent Pre-Owned
Factory Warranty: Remaining Omega Five-Year Factory Warranty, Subject to Exact Card Date
Included: Box, Papers, and Cards

Collector Provenance

The Seamaster Diver 300M has been one of Omega’s defining sports watches since 1993.

The current generation brought the collection fully into Omega’s ceramic and Master Chronometer era, combining the familiar wave dial, skeletonized hands, helium escape valve, and scalloped bezel with a modern movement visible through a sapphire caseback.

The white dial gives the design a very different character from the more common blue and black executions.

It is brighter, cleaner, and more graphic, with the black bezel and handset providing enough contrast to keep the watch firmly in tool-watch territory.

Design Provenance

The dial is the centerpiece.

White ceramic creates a crisp surface that changes subtly with lighting while allowing the engraved wave pattern to remain visible without becoming dominant.

The black ceramic bezel frames the dial sharply, while the steel bracelet gives the watch enough visual weight to balance the bright center.

The result is one of the most recognizable modern Seamaster configurations.

Technical Provenance

The Calibre 8800 is one of Omega’s core Master Chronometer movements.

It uses Omega’s Co-Axial escapement, provides approximately 55 hours of power reserve, and is certified by METAS after testing of the fully assembled watch.

The movement is also highly resistant to magnetic fields, making it particularly well suited to everyday modern use.

The surrounding hardware is equally serious: screw-down crown, helium escape valve, sapphire crystal, ceramic dive bezel, and 300 meters of water resistance.

From the Case File

This is a full-strength modern Seamaster in one of its cleanest colorways.

The 42 mm case has substantial presence, but the white dial keeps the watch feeling open and bright rather than heavy.

Case 686 dates from 2025, presents in Excellent Pre-Owned condition, includes Box, Papers, and Cards, and is sized for approximately a 7¾-inch wrist.

It also retains substantial Omega factory warranty coverage.

BST Verdict

One of the strongest core Seamaster 300M configurations.

The white ceramic wave dial, black ceramic bezel, steel bracelet, Calibre 8800, and 300-meter capability give the watch a distinctive look without sacrificing any of the practical strengths that make the Diver 300M such an easy everyday sports watch.

Case 686 adds a 2025 date, Excellent condition, BPC, and plenty of remaining factory warranty.

Every case deserves a closer look.