Omega Aqua Terra Seamaster Aqua Terra 150M Co-Axial 38.5 Stainless Steel / Diamond / Black

Reference 231.18.39.21.51.001

Omega Seamaster Aqua Terra 150M Co-Axial 38.5 Stainless Steel / Diamond / Black

About this watch

The Omega Seamaster Aqua Terra is a masterpiece of horological innovation, seamlessly blending elegance with performance. This stunning timepiece boasts an automatic Omega caliber 8500 movement, providing 60 hours of power reserve and a Master Co-Axial Chronometer designation for exceptional precision and performance. The case is crafted from high-quality stainless steel, resistant to corrosion and wear, while the diamond-set bezel adds a touch of luxury without being overly ostentatious. With its impressive water resistance of 150 meters, this watch is versatile enough for swimming, snorkeling, and everyday wear. Whether you're looking for a professional or laid-back vibe, the Aqua Terra's design allows it to transition seamlessly between different settings, making it the perfect addition to any luxury watch collection.
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Key Features

  • Omega caliber 8500 automatic movement
  • 60 hours of power reserve
  • Master Co-Axial Chronometer designation
  • Stainless steel case with diamond-set bezel
  • 150 meters water resistance
  • Sapphire crystal glass for scratch resistance and clarity
  • Black dial with stick and dot indexes

Specifications

Brand
Omega
Family
Aqua Terra
Model
Seamaster Aqua Terra 150M Co-Axial 38.5 Stainless Steel / Diamond / Black
Reference
231.18.39.21.51.001
Movement
8500
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Chronometer, Co-Axial Escapement
Case
Stainless Steel 38.5mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
150

Current Listings

[WTS] Omega Aqua Terra 231.10.39 Cal 8500 38.5 mm - $2,650

Omega Aqua Terra 231.10.39 Cal 8500 38.5 mm - $2,650

Omega - 231.10.39 Cal 8500 · $2,650
Up for sale is my Omega Aqua Terra 231.10.39 Cal 8500. This watch measures at 39mm and has an OMEGA 8500 movement.

  • Condition: great condition, minimal marks on the case and bezel
  • Case size: 39mm
  • Movement: Calibre OMEGA 8500
  • Bracelet material: steel
Posted at
Apr 15, 2026, 4:33 AM
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View listing on r/WatchExchange
[WTS] Omega Aqua Terra 2503.30 39mm Champagne Dial Box and Papers - $2,350

Omega Aqua Terra 2503.30 39mm Champagne Dial Box and Papers - $2,350

Omega - 2503.30 · $2,350
Up for sale is my great condition Omega Seamaster 2503.30, measuring at 39mm with an automatic Omega Calibre 2500 movement.

  • Condition: Very good condition for its age with minimal marks/hairlines on the case, caseback, and bracelet
  • Diameter: 39mm
  • Movement: Omega Calibre 2500
Posted at
Apr 15, 2026, 4:25 AM
Active
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[WTS] Omega Seamaster Aqua Terra 150m Master Co-Axial Golf Edition (2020) Complete Kit With Extra Straps 220.12.41.21.01.002

Omega Seamaster Aqua Terra 150m Master Co-Axial Golf Edition (2020) Complete Kit With Extra Straps 220.12.41.21.01.002

Omega - 220.12.41.21.01.002 · $4,500
A fantastic, versatile watch with a sporty edge in the Omega Seamaster Aqua Terra Golf Edition.

  • Condition: Used, excellent condition
  • Case size: 41mm diameter
  • Water resistance: 150m depth rating
  • Movement: Omega Co-Axial Master Chronometer
Posted at
Apr 12, 2026, 2:19 AM
Active
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[WTS] 2023 Omega Seamaster Aqua Terra Skyfall Blue 231.10.42.21.03.003 41.5mm Full Set - $4,995

2023 Omega Seamaster Aqua Terra Skyfall Blue 231.10.42.21.03.003 41.5mm Full Set - $4,995

Omega - 231.10.42.21.03.003 · $4,995
A 2023 Omega Seamaster Aqua Terra Skyfall Blue, a luxury watch featuring a 41.5mm case size.

  • Condition: Excellent condition with minimal signs of wear
  • Year: 2023
  • Size: 41.5mm diameter
  • Contents: Watch,Inner & Outer Box,Card Holder,International Warranty Card,Pictograms Card,Instructions Manual,Hang Tag
Posted at
Apr 11, 2026, 1:17 PM
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[WTS] Omega Seamaster Aqua Terra 36mm Ref. 2504.50 | Great Condition | Inky Black Sunray Dial | Co-Axial Caliber 2500 | All Original | $2450 (SERVICED)

Omega Seamaster Aqua Terra 36mm Ref. 2504.50 | Great Condition | Inky Black Sunray Dial | Co-Axial Caliber 2500 | All Original | $2450 (SERVICED)

Omega - 2504.50 · $2,450
A modern classic with the soul of a Seamaster, this Omega Aqua Terra Ref. 2504.50 features a 36mm stainless steel case, inky black sunray dial, and Co-Axial Caliber 2500 movement.

  • Condition: Great Condition
  • Movement: Serviced Automatic Caliber 2500 (Co-Axial Chronometer)
  • Dial: Pristine Deep Black Sunray dial with applied indices
  • Case: Sharp Stainless Steel construction with original factory geometry, Diameter: 36.2 mm (excluding crown), Thickness: 11 mm, Lug-to-lug: 44 mm
Posted at
Apr 11, 2026, 10:47 AM
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[WTS] Omega Aqua Terra 38 mm - original new bracelet

Omega Aqua Terra 38 mm - original new bracelet

Omega - 020STZ006276 · $895
Aqua Terra 38mm watch with a new original bracelet, barely worn.

  • Condition: practically new
  • Width: 19mm
  • Location: Warsaw, Poland, EU
Posted at
Apr 11, 2026, 9:42 AM
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[WTS] Omega Seamaster Aqua Terra Blue 231.13.42.21.03.001 2023 B&P Repost

Omega Seamaster Aqua Terra Blue 231.13.42.21.03.001 2023 B&P Repost

Omega - 231.13.42.21.03.001 · $3,549
The Omega Seamaster Aqua Terra is a luxury watch known for its sleek design and precise timekeeping, available in various sizes to suit different wrist preferences.

  • Condition: Excellent condition
  • Case Size: 41.5mm
  • Box And Papers: 2023 box and papers
  • Band Condition: pre owned but in great shape
Posted at
Apr 10, 2026, 10:08 PM
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[WTS] OMEGA Seamaster Aqua Terra Worldtimer "Summer Blue" Ref. 220.10.43.22.03.002 - ULTIMATE SET! 🔥$9,600🔥

OMEGA Seamaster Aqua Terra Worldtimer "Summer Blue" Ref. 220.10.43.22.03.002 - ULTIMATE SET! 🔥$9,600🔥

OMEGA - 220.10.43.22.03.002 · $9,600
The OMEGA Seamaster Aqua Terra Worldtimer Ref. 220.10.43.22.03.002 is a sophisticated travel companion that puts the world on your wrist.

  • Condition: VERY GOOD (some light scratches on case and bracelet)
  • Case size: 43mm
  • Bracelet length adjustment: ~7"
  • Contents: ULTIMATE SET (box, papers, serial hang tag, spare links, shipping coffin, and digital copy of original purchase receipt)
Posted at
Apr 10, 2026, 9:11 PM
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[WTS] OMEGA Seamaster Aqua Terra 150M Terracotta Ref. 220.10.38.20.13.003 - ULTIMATE SET! 🔥$6,100🔥

OMEGA Seamaster Aqua Terra 150M Terracotta Ref. 220.10.38.20.13.003 - ULTIMATE SET! 🔥$6,100🔥

OMEGA - 220.10.38.20.13.003 · $6,100
The OMEGA Seamaster Aqua Terra Ref. 220.10.38.20.13.003 features a Terracotta dial, symmetrical case design, and polished brushed bracelet.

  • Condition: UNWORN
  • Model name: Seamaster Aqua Terra 150M
  • Case size: 38mm diameter
  • Bracelet length: ~7" (pre-sized)
Posted at
Apr 10, 2026, 9:08 PM
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