Skip to product information
Omega Seamaster Aqua Terra 150M Co-Axial Chronometer 30mm Stainless Steel Diamond Bezel White Mother of Pearl Dial Diamond Set Index Alligator Leather Strap 231.18.30.20.55.001 - BRAND NEW

Omega Seamaster Aqua Terra 150M Co-Axial Chronometer 30mm Stainless Steel Diamond Bezel White Mother of Pearl Dial Diamond Set Index Alligator Leather Strap 231.18.30.20.55.001 - BRAND NEW Omega Seamaster Aqua Terra 150M Co-Axial Chronometer…

Reference 231.18.30.20.55.001

Full watch configuration

Omega Seamaster Aqua Terra 150M Co-Axial Chronometer 30mm Stainless Steel Diamond Bezel White Mother of Pearl Dial Diamond Set Index Alligator Leather Strap 231.18.30.20.55.001 - BRAND NEW

$8,899.00
Requested condition
Brand New

By Omega

Sourced to order. We confirm the watch, condition and final price before purchase. Reference images shown.

Eligible watches: 90-day returns for store credit only. Brand-new watches and other exclusions are final sale. Return terms.

Omega Seamaster Aqua Terra 150M Co-Axial Chronometer 30mm Stainless Steel Diamond Bezel White Mother of Pearl Dial Diamond Set Index Alligator Leather Strap 231.18.30.20.55.001 - BRAND NEW

Omega Seamaster Aqua Terra 150M Co-Axial Chronometer 30mm Stainless Steel Diamond Bezel White Mother of Pearl Dial Diamond Set Index Alligator Leather Strap 231.18.30.20.55.001 - BRAND NEW

Current Catalogue Asking Price:

Your Offer

$

Submit your offer for review. Availability and the final price require confirmation.

Preferred Contact Method
I have a trade-in / add a note

Reserve with $200

Omega Seamaster Aqua Terra 150M Co-Axial Chronometer 30mm Stainless Steel Diamond Bezel White Mother of Pearl Dial Diamond Set Index Alligator Leather Strap 231.18.30.20.55.001 - BRAND NEW

Catalogue watch price: $8,899.00 USD

Your $200 deposit is applied to the watch’s purchase price. It is refundable only if Bizak & Co. cannot fulfill your order.

Estimated remaining balance: $. Pay by bank wire or cryptocurrency after we confirm your watch and final invoice. Shipping and applicable taxes are additional.

Shipping details · Return terms

Watch shipping is paid with the final balance: $100 for U.S. overnight delivery or $500 internationally. Applicable taxes and import charges are additional.

After payment, our team starts the tailored search and contacts you to confirm the specific watch and final invoice. A deposit does not guarantee a unit, the listed price or a delivery date.

Need installments? Check eligibility before paying a deposit.

Speak with a Bizak & Co. specialist about this piece

|Call or Text

The Omega Seamaster Aqua Terra 150M reference 231.18.30.20.55.001 is a brand-new 30mm stainless steel Co-Axial Chronometer featuring a white mother-of-pearl dial with diamond-set indexes and a sparkling diamond-set bezel. Presented on an alligator leather strap, this refined 30mm case size makes it an ideal choice for those seeking understated luxury with genuine horological credentials.

What sets this reference apart is the seamless marriage of Omega's celebrated Co-Axial movement technology with exquisite diamond and mother-of-pearl finishing—hallmarks of a true dress sport watch. Available brand new at Bizak & Co., contact us today to secure this stunning piece or browse our full Omega collection at bizakandco.com.

Compare it across every Seamaster Aqua Terra 150M reference we carry, or browse the full Omega collection at Bizak & Co.

Buy this Seamaster Aqua Terra 150M, trade in your current watch, or sell us yours. Contact Bizak & Co. to make an offer or request a fair-market valuation.

Not the exact one you’re looking for?

Source your dream watch

Learn More

The Omega Seamaster Aqua Terra 150M is one of the most versatile and enduringly popular collections in Omega's modern lineup, sitting at the intersection of the brand's legendary maritime heritage and the demands of contemporary refined dressing. First introduced in the early 2000s, the Aqua Terra was conceived as a watch equally at home on a yacht deck or at a boardroom table, and over the decades it has attracted a devoted following among collectors who prize both elegance and mechanical integrity. Reference 231.18.30.20.55.001 represents the collection's most dressed, most feminine expression—a 30mm proposition that brings serious watchmaking to those who prefer a more delicate wrist presence without sacrificing any of Omega's engineering pedigree.

The dial of this reference is one of its most captivating attributes. White mother-of-pearl is a material prized by watchmakers for its natural iridescence: no two dials are ever identical, as the nacre shifts subtly between ivory, cream, and faint rose depending on the angle of light. On this reference, the mother-of-pearl canvas is complemented by diamond-set indexes that catch and scatter light with every movement of the wrist, elevating what might otherwise be a sporting dial into something genuinely jewellery-adjacent. The result is a dial that feels alive, luminous, and deeply personal.

The diamond-set bezel frames the dial with a continuous circuit of precisely matched stones, adding further brilliance to the watch's profile without overwhelming its proportions. At 30mm across a stainless steel case, the Aqua Terra wears with the kind of quiet confidence that only comes from knowing every detail has been executed to the highest standard. The case's clean, polished and satin-brushed surfaces are characteristic of Omega's meticulous finishing, and the stainless steel material ensures long-term durability and resistance to the minor hazards of daily wear.

Powering the watch is Omega's Co-Axial Chronometer movement, a technology synonymous with the brand's post-millennium revival of manufacturing excellence. The Co-Axial escapement, developed in partnership with the late watchmaker George Daniels, reduces friction within the escapement mechanism, contributing to improved long-term rate stability and extended service intervals compared with conventional lever escapements. Chronometer certification means the movement has passed the rigorous independent timing tests of the COSC, confirming its precision across a range of temperatures and positions—an assurance that matters whether you are buying for everyday wear or for a treasured collection.

The alligator leather strap completes the watch's identity as a dress piece of the highest order. Alligator leather is the benchmark material for luxury watch straps, valued for its distinctive scale pattern, supple feel after wearing in, and exceptional longevity when properly cared for. It gives the 231.18.30.20.55.001 a formal, jewellery-like wrist presence that a bracelet simply could not replicate, and it pairs beautifully with the mother-of-pearl and diamond dial.

At Bizak & Co., we are proud to offer this reference brand new, meaning it arrives in full, unworked, factory condition with all original protectors and presentation intact. Our team of experienced watch specialists is on hand to answer every question, discuss pricing, and arrange secure worldwide shipping. If you are looking to buy the Omega Seamaster Aqua Terra 231.18.30.20.55.001 online, visit bizakandco.com or contact us directly—we are committed to making your acquisition as seamless as the timepiece itself.

Technical Details
Reference
231.18.30.20.55.001
Model
Seamaster Aqua Terra 150M
Movement
Automatic
Case material
Stainless Steel
Bracelet material
Leather
Dial
White mother-of-pearl with diamond-set indexes
Case size
30mm
Requested condition
Brand New
FAQ

1. What makes the Omega Seamaster Aqua Terra 231.18.30.20.55.001 special?
This reference combines a white mother-of-pearl dial with diamond-set indexes and a full diamond-set bezel within a refined 30mm stainless steel case, making it one of the most jewellery-forward expressions in the Aqua Terra line. It is also backed by Omega's Co-Axial Chronometer movement, so exceptional aesthetics come hand in hand with certified mechanical precision.

2. What movement powers the Omega Seamaster Aqua Terra 231.18.30.20.55.001?
The watch is powered by an Omega Co-Axial Chronometer movement, a designation that confirms both the use of Omega's advanced Co-Axial escapement technology and independent COSC chronometer certification for precision timekeeping. The Co-Axial escapement is designed to reduce wear on the movement's components, contributing to greater long-term accuracy and longer service intervals.

3. What is the case size of this Aqua Terra reference?
The reference 231.18.30.20.55.001 features a 30mm stainless steel case, making it ideally suited to those who prefer a more delicate or refined wrist presence. The 30mm diameter sits firmly in the category of elegantly sized dress watches while retaining the Aqua Terra's characteristic sporty proportions.

4. Is the Omega Seamaster Aqua Terra 30mm suitable for everyday wear?
Yes—the Aqua Terra 150M line is engineered for versatility, and the stainless steel case provides strong durability for daily use. The alligator leather strap and diamond set elements give this particular reference a dressier character, making it especially well suited to occasions that call for something more refined, though many owners wear it daily as a statement piece.

5. What is the dial and bezel material on the 231.18.30.20.55.001?
The dial is crafted from white mother-of-pearl, a naturally iridescent material whose unique visual character means no two dials are exactly alike, and it is set with diamond indexes. The bezel is fully set with diamonds, framing the dial with continuous brilliance and giving the watch a distinctly jewellery-inspired aesthetic.

6. How can I buy the Omega Seamaster Aqua Terra 231.18.30.20.55.001 from Bizak and Co.?
This watch is available brand new at Bizak & Co. via bizakandco.com, where you can browse our full inventory and contact our team directly for pricing, availability, and shipping options. We welcome inquiries by phone, email, or through our website, and we are happy to assist collectors and first-time buyers alike in securing this exceptional timepiece.

Certified Authenticity

Every watch is authenticated before delivery.

Real Family Business

You're buying from genuine people, 30 years in business.

Bizak & Co. Warranty

Every watch is checked by us before shipping.

5 Years Warranty

Our five-year Bizak & Co. warranty covers manufacturing defects affecting mechanical operation under normal use, starting on delivery. It is separate from any remaining manufacturer warranty.

Exclusions include accidental damage, misuse, water damage, cosmetic damage, normal wear, loss and theft. Coverage and service availability for vintage or modified watches are confirmed in writing before purchase.

Read the full warranty terms and service instructions. 

90-Day Returns for Store Credit

Eligible watches may be returned within 90 days for store credit. Brand-new watches and other exclusions are final sale.

Read eligibility, condition requirements, and exclusions.

Insured delivery

Insured shipping

U.S. overnight shipping is $100; international shipping is $500. Dispatch takes 2–3 business days after your wire clears. International transit times vary. Shipping details.

You might also like...

Customer Reviews

Read our reviews on Trustpilot

  • Great family business

    Great family business. They went out of their way to make my purchase go smoothly, they definitely earned my watch business!

    Paul

    Read on Trustpilot ↗
  • Good seller

    Good seller. Honest family

    Mateusz

    Read on Trustpilot ↗
  • Honest family company

    Honest family company. I’ve done business many times!

    Mollie

    Read on Trustpilot ↗
  • Trusted Seller

    Trusted Seller, Definitely recommend for all watches purchase!

    Consumer

    Read on Trustpilot ↗
  • Trusted and honest seller

    Trusted and honest seller. Deal with confidence.

    Jean Dib

    Read on Trustpilot ↗