Case #723 — Omega Seamaster Diver 300M “Blue Wave” Ref. 210.30.42.20.03.001

Case #723 — Omega Seamaster Diver 300M “Blue Wave”
Ref. 210.30.42.20.03.001

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

Case Notes

Few modern Omega watches are as immediately recognizable as the blue Seamaster Diver 300M.

The 42 mm stainless-steel case is paired with a polished blue ceramic dial cut with Omega’s laser-engraved wave pattern, a matching blue ceramic dive bezel, skeletonized hands, and the familiar helium escape valve at 10 o’clock.

It is the color combination most closely associated with the modern Seamaster family, but the current generation brings significantly more underneath the familiar design.

Inside is Omega’s Co-Axial Master Chronometer Calibre 8800, an automatic movement with approximately 55 hours of power reserve 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 coverage under Omega’s five-year international factory warranty, subject to the exact warranty-card activation date and Omega warranty terms.

The Evidence

Reference: 210.30.42.20.03.001
Model: Seamaster Diver 300M
Year: 2025
Case: Stainless Steel
Case Diameter: 42 mm
Lug Width: 20 mm
Dial: Polished Blue Ceramic with Laser-Engraved Wave Pattern
Crystal: Domed Sapphire with Anti-Reflective Treatment
Bezel: Blue Ceramic, Unidirectional, with White Enamel Diving Scale
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
Jewels: 35
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 part of Omega’s core sports-watch identity since 1993.

The blue version is the configuration most closely tied to that history, carrying forward the color palette that helped make the collection one of Omega’s most recognizable modern watches.

The current generation returned the wave motif to the dial while moving the watch fully into Omega’s ceramic and Master Chronometer era.

That combination gives the reference a useful balance: instantly familiar visually, but thoroughly modern mechanically.

Design Provenance

The blue ceramic dial is the centerpiece.

Its laser-engraved waves change dramatically with the light, becoming subtle at some angles and sharply defined at others.

The matching blue ceramic bezel keeps the color continuous around the case, while the skeletonized hands and applied markers preserve the look that has defined the Seamaster Diver 300M for decades.

The steel bracelet gives the watch enough visual weight to balance the 42 mm case and makes it the most traditional configuration of the current blue Seamaster.

Technical Provenance

Omega’s Calibre 8800 is a METAS-certified Master Chronometer movement built around the Co-Axial escapement.

It provides approximately 55 hours of power reserve and is designed for strong resistance to magnetic fields encountered in everyday environments.

The movement is visible through the sapphire exhibition caseback.

The surrounding watch is equally capable, with a screw-down crown, helium escape valve, sapphire crystal, ceramic dive bezel, and 300 meters of water resistance.

From the Case File

This is the modern Seamaster in its signature configuration.

The blue ceramic dial and bezel give the watch unmistakable visual identity, while the 42 mm steel case and bracelet keep it firmly in professional sports-watch territory.

Case 723 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.

The recent date also means substantial Omega factory warranty coverage remains, subject to the exact card activation date.

Buy with Confidence

BST guarantees the authenticity of every watch we sell and provides a 30-day mechanical performance guarantee under normal use.

Accuracy may vary with age and service history, and water resistance is not guaranteed unless specifically stated and pressure-tested.

BST Verdict

The definitive modern blue Seamaster.

The blue ceramic wave dial, matching ceramic bezel, steel bracelet, Calibre 8800, METAS certification, and 300-meter capability combine the visual identity that made the Diver 300M famous with Omega’s current movement technology.

Case 723 adds a 2025 date, Excellent condition, complete BPC presentation, and substantial remaining factory warranty to one of the strongest all-purpose sports watches in Omega’s current lineup.

Every case deserves a closer look.