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

Omega Aqua Terra Small Seconds

Omega - Small Seconds

The watch is an Omega Aqua Terra with a small seconds feature.

Posted at

Jan 19, 2026, 1:37 PM

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Omega Seamaster Aqua Terra 38mm Black/Steel | 220.12.38.20.01.001 | No Box or Papers | Extra Alligator Leather Strap | Good Condition | Priced to Sell

Omega - 220.12.38.20.01.001 · $3,750

The Omega Seamaster Aqua Terra is a tribute to OMEGA’s rich maritime heritage, featuring a stainless steel case and a black dial with a horizontal ‘teak’ pattern.

Condition: Good condition, has a few scratches
Case diameter: 38mm
Water resistance: 150m
Power reserve: 55 hours

Posted at

Jan 19, 2026, 11:38 AM

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Omega Speedmaster Aqua Terra 38mm Full Set

Omega - Aqua Terra 38mm · $4,250

Beautiful Omega Aqua Terra 38mm up for sale. It has a protective film on the case and bracelet, adding scratch protection.

Condition: Good pre-owned condition
Bracelet length: 6.75in
Strap material: rubber
Box contents: Inner and Outter Box, cards, tag, OEM bracelet, another set of WatchShell film and tweezers

Posted at

Jan 19, 2026, 10:52 AM

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Omega Seamaster Aqua Terra 2023 41mm Grey 220.10.41.21.06.001 Full Set - $5,495

Omega - 220.10.41.21.06.001 · $5,495

A 2023 Omega Seamaster Aqua Terra Grey, with a 41mm case size, available in excellent condition.

Condition: Excellent condition with minimal signs of wear
Year: 2023
Size: 41mm diameter
Contents: full links, inner & outer box, card holder, international warranty card, master chronometer card, pictograms card

Posted at

Jan 19, 2026, 10:41 AM

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Omega Aqua Terra 38mm // METAS Chronometer // 150m WR // Full Kit

Omega - 220.10.38.20.01.001 · $4,099

This listing is for an Omega Aqua Terra ref. 220.10.38.20.01.001 from late 2023, featuring a stainless steel case with automatic movement.

Condition: Great, minor hairlines or two on the polished bezel and bracelet
Case diameter: 38mm
Lug-to-lug: 45mm
Lug width: 19mm

Posted at

Jan 18, 2026, 7:14 PM

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Omega Seamaster Aqua Terra - Black Wave - Red Gold Accents - 2025

Omega - 231.10.42.21.01.006 · $5,250

The Omega Seamaster Aqua Terra features a striking black wave dial with red gold accents, powered by the Master Co-Axial Calibre 8500.

Case size: 41.5mm
Water resistance depth rating: 150m / 15 bar

Posted at

Jan 18, 2026, 3:08 PM

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Omega Seamaster Aqua Terra Worldtimer “Summer Blue”

Omega - 220.10.43.22.03.002 · $8,750

The Omega Aqua Terra Worldtimer 'Summer Blue' features a light blue dial and is one of the world's premier timepieces for travelers, offering a unique combination of style and functionality.

Condition: Excellent condition
Dial color: light blue
Water resistance: unknown
Movement: Worldtimer

Posted at

Jan 18, 2026, 10:45 AM

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Omega Aqua Terra 2504.50 // 36mm // 150m WR // 2025 Full Service

Omega - 2504.50 · $2,725

The Omega Aqua Terra is a modern classic with a black dial and co-axial movement, suitable for various activities.

Condition: Great, light hairlines throughout but no major blemishes to note
Case material: stainless steel
Case diameter: 36.2mm
Lug-to-lug: 44mm

Posted at

Jan 17, 2026, 8:12 PM

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Omega Seamaster Aqua Terra 150m | Calibre 8500 Co-Axial | 231.10.39.21.06.001

Omega - 231.10.39.21.06.001 · $2,799

This listing is for an Omega Seamaster Aqua Terra 150m with Calibre 8500 Co-Axial movement, featuring a 38.5mm case size and a 7.25-inch long bracelet.

Depth rating: 150m
Bracelet length: 7.25 inches

Posted at

Jan 17, 2026, 5:59 PM

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