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

Reference 231.13.39.21.55.001

About this watch

Welcome, watch enthusiasts! If you’re on the lookout for a watch that combines elegance, durability, and precision, then you’re in the right place. Today, we’re diving deep into the stunning world of the Omega Seamaster Aqua Terra 150M Co-Axial 38.5 Stainless Steel / MOP. With a reference number of 231.13.39.21.55.001, this timepiece is a true gem. The brand has a rich legacy of precision timekeeping, and they’ve even been to the moon! So, you can bet that their timepieces are engineered with meticulous care. The Seamaster Aqua Terra family is all about versatility. Whether you’re dressing up for a gala or just enjoying a casual day out, this collection has something for everyone. The first thing you’ll notice about the Aqua Terra is its breathtaking Mother of Pearl (MOP) dial. It’s like wearing a piece of the ocean on your wrist! The iridescent surface catches light beautifully, creating a mesmerizing display that changes with every angle. With a diameter of 38.50 mm, the watch strikes a perfect balance between formality and casual wear. It’s large enough to make a statement yet not so bulky that it becomes cumbersome. The stainless steel case is polished to perfection, giving it a sleek and shiny appearance. Plus, the open case back is a delightful touch, inviting you to admire the intricate movement inside. This watch isn’t just a timepiece; it’s a conversation starter. With a water resistance of 150 meters, the Aqua Terra is versatile enough for both the beach and the boardroom. Whether you’re swimming, snorkeling, or just caught in an unexpected rainstorm, you don’t have to worry about water damage. Omega really thought of everything! The stainless steel bracelet is both sturdy and comfortable. It features a classic design with a secure clasp that ensures it stays safely on your wrist. The brushed and polished links add a touch of sophistication, making it suitable for any occasion. Plus, it’s adjustable, so you can get the perfect fit. Wearing the Aqua Terra feels like a dream. The weight is just right—not too heavy or too light. You’ll forget you have it on, and yet it draws compliments wherever you go. It’s the kind of watch that makes you feel confident, whether you’re on a business call or enjoying a night out. With its stunning design, robust movement, and unbeatable versatility, this watch is a worthy addition to any collection.
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MSRP: $6,600
Market Price: $3,187

Key Features

  • Omega caliber 8500 movement
  • 38.50 mm stainless steel case
  • 150 meters water resistance
  • Mother of Pearl dial
  • Stainless steel bracelet with secure clasp
  • Open case back for viewing movement
  • Chronometer certified for accuracy

Specifications

Brand
Omega
Family
Aqua Terra
Model
Seamaster Aqua Terra 150M Co-Axial 38.5 Stainless Steel / MOP
Reference
231.13.39.21.55.001
Movement
8500
Movement Features
  • Hours, Minutes, Seconds
  • Date
  • Chronometer, Co-Axial Escapement
Case
Stainless Steel 38.5mm
Dial Color
White
Crystal
Sapphire
Water Resistance
150

Current Listings

[WTS] Omega Aqua Terra 2503.80 - 39mm - Blue Automatic - Price Reduced

Omega Aqua Terra 2503.80 - 39mm - Blue Automatic - Price Reduced

Omega - 2503.80 · $2,695
Additional Details: Omega Seamaster Aqua Terra Blue Dial Automatic. A timegrapher photo is included, and wrist size is shown in the photo reel.

  • Condition: pre-owned, clean condition with light wear throughout
  • Size: 39mm diameter
Posted at
May 12, 2026, 9:44 PM
Active
[WTS] Omega Aqua Terra 231.10.39 Cal 8500 38.5 mm Master Co-Axial Box and Papers - $3,250

Omega Aqua Terra 231.10.39 Cal 8500 38.5 mm Master Co-Axial Box and Papers - $3,250

Up for sale is my Omega Aqua Terra 231.10.39.21.02.002 Cal 8500, measuring at 39mm with a Calibre OMEGA 8500 movement.

  • Condition: 8.9/10, great condition with minimal marks on the case and bracelet
  • Case size: 39mm diameter
  • Movement: Calibre OMEGA 8500
  • Bracelet material: steel
Posted at
May 11, 2026, 10:10 PM
Active
[WTS] Omega Aqua Terra 231.10.39 Cal 8500 38.5 mm Master Co-Axial - $2,950

Omega Aqua Terra 231.10.39 Cal 8500 38.5 mm Master Co-Axial - $2,950

Up for sale is my great condition Omega Aqua Terra 231.10.39.21.02.002 Cal 8500. This watch measures at 39mm and has an Calibre OMEGA 8500 movement.

  • Condition: Great condition, minimal marks on the case and bracelet
  • Movement: Calibre OMEGA 8500
  • Case size: 39mm diameter
  • Bracelet type: Original Omega steel bracelet, replaced with OEM all brushed version
Posted at
May 11, 2026, 10:06 PM
Active
[WTS] Omega Seamaster Aqua Terra 231.10.39.21.01.001 Black Teak 38.5mm  - $2,790

Omega Seamaster Aqua Terra 231.10.39.21.01.001 Black Teak 38.5mm - $2,790

Up for sale is my great condition Omega Seamaster Aqua Terra 231.10.39.21.01.001. This watch measures at 38.5mm and has an automatic Omega Calibre 8500 movement.

  • Condition: Very good condition for its age, minimal marks/hairlines
  • Case Size: 38.5mm diameter
  • Movement: Omega Calibre 8500, automatic
Posted at
May 11, 2026, 10:01 PM
Active
[WTS] Omega Seamaster Aqua Terra - Black 39mm - 2503.50

Omega Seamaster Aqua Terra - Black 39mm - 2503.50

Omega - 2503.5 · $2,750
A 39mm Omega Seamaster Aqua Terra in black, with minor wear throughout and a small mark on the bezel/crystal near the 12 o'clock marker.

  • Condition: Pre-owned, minor wear throughout
  • Size: 39mm diameter
  • Bezel mark: small mark on bezel/crystal near the 12 o'clock marker
Posted at
May 11, 2026, 5:33 PM
Active
[WTS] Omega Seamaster Aqua Terra Rose Gold 38mm with box and papers

Omega Seamaster Aqua Terra Rose Gold 38mm with box and papers

This Omega Seamaster Aqua Terra is a 38mm rose gold watch with a clean and balanced design, featuring stainless steel and rose gold accents that add depth and elegance.

  • Condition: Excellent
  • Case Size: 38mm diameter
  • Year: 2021 (dated December)
  • Box And Papers: complete set including warranty card, booklets, cloth bag, and all links
Posted at
May 11, 2026, 11:06 AM
Active
[WTS] Omega Aqua Terra 2504.50 36mm First Gen Automatic $2,500 (Recently Serviced)

Omega Aqua Terra 2504.50 36mm First Gen Automatic $2,500 (Recently Serviced)

Omega - 2504.50 · $2,500
The Omega Aqua Terra is a first-generation automatic watch with a 36mm case size, powered by the 2500B movement.

  • Condition: Excellent condition, freshly polished
  • Movement: 2500B
  • Size: 36mm diameter
  • Length of strap: up to 18.5cm
Posted at
May 11, 2026, 9:00 AM
Active
[WTS] Omega Seamaster Aqua Terra 220.10.41.21.06.001 41mm Automatic Grey Dial Full Set

Omega Seamaster Aqua Terra 220.10.41.21.06.001 41mm Automatic Grey Dial Full Set

This Omega Seamaster Aqua Terra is a 41mm stainless steel automatic watch with a grey teak dial, accompanied by its original outer box, inner box, and undated warranty card.

  • Condition: Very good
  • Movement: Automatic
  • Case size: 41mm diameter
  • Bracelet material: Stainless steel
Posted at
May 11, 2026, 8:54 AM
Active
[WTS] Omega Seamaster Aqua Terra 150m, 41mm (Ref: 220.10.41.21.02.004) Small Seconds - $4500 USD Shipped

Omega Seamaster Aqua Terra 150m, 41mm (Ref: 220.10.41.21.02.004) Small Seconds - $4500 USD Shipped

This Omega Seamaster Aqua Terra 150M is a 41mm watch with a silver dial and blue accents, featuring small seconds.

  • Condition: lightly used with minor wear
  • Case diameter: 41mm
  • Water resistance: 150m
Posted at
May 11, 2026, 3:33 AM
Active