Case #658 — Omega Aqua Terra 41 (Grey) Ref. 220.10.41.21.06.001

Case #658 — Omega Seamaster Aqua Terra 150M Co-Axial Master Chronometer 41 mm "Grey Teak"

Ref. 220.10.41.21.06.001

Status: Available

Condition: Good Pre-Owned

Scope: Box, Papers, and Cards

Year: 2023

🔎 Case Notes

Grey is the quiet colour in the Aqua Terra 41 line-up, and it is arguably the most interesting one. The dial carries the horizontal "teak" pattern inspired by the wooden decks of luxury sailboats, with a date window at 6 o'clock and blued hands and indexes filled with white Super-LumiNova. In practice that means a dial that reads cool and near-monochrome in shade, then warms and shifts as the blued hands catch the light — a subtler effect than the familiar blue or black versions, and one that rewards a second look.

Underneath sits the OMEGA Master Chronometer calibre 8900, certified at the industry's highest standard by the Swiss Federal Institute of Metrology (METAS), a movement unaffected by exposure to strong magnetic fields, even those greater than 1.5 tesla (15,000 gauss). On our timing machine this example measured -1 second per day with an amplitude of 345 degrees — a genuinely healthy set of numbers for a watch that has clearly been worn and enjoyed.

And it has been worn. This is an honest Good Pre-Owned example with visible wear throughout: the bracelet shows signs of use, and there is light marking to the case and to the high-polish fixed bezel. Nothing here is hidden or dressed up. What you are buying is a 2023 Aqua Terra that has lived on a wrist rather than in a safe, accompanied by its Box, Papers, and Cards, and currently sized to fit an approximately 7¾-inch wrist.

🕰️ The Evidence

• Reference: 220.10.41.21.06.001
• Model / Collection: Omega Seamaster Aqua Terra 150M Co-Axial Master Chronometer 41 mm
• Year: 2023
• Case: Stainless Steel, symmetrical case with wave-edged design on the back
• Case Diameter: 41 mm
• Dial: Grey with horizontal "teak" pattern, applied stick indices, date at 6 o'clock, blued hands and indexes filled with white Super-LumiNova
• Crystal: Sapphire, anti-reflective coated
• Bezel: Fixed polished stainless steel
• Crown: Screw-in
• Caseback: Screw-in, wave-edged design with sapphire window
• Movement: Omega Co-Axial Master Chronometer Calibre 8900, automatic
• Certification: Master Chronometer, certified by METAS
• Power Reserve: 60 hours (twin barrels), with time-zone function
• Functions: Hours, minutes, central seconds, date, independently adjustable hour hand
• Water Resistance: 150 metres / 492 feet
• Bracelet: Stainless steel, polished and brushed
• Clasp: Butterfly folding clasp
• Bracelet Fit: Approximately 7¾-inch wrist
• Measured Performance: -1 second per day; 345° amplitude (measured by BST)
• Condition: Good Pre-Owned — visible wear throughout; bracelet shows signs of use; light marking to the case and high-polish bezel
• Factory Warranty: Dated 2023 warranty card supplied; may remain within Omega's five-year factory warranty period, subject to the exact warranty-card activation date and Omega warranty terms
• Included: Box, Papers, and Cards

🌟 Collector Provenance

The Aqua Terra was introduced in 2002 as a successor to the earlier Seamaster 120 — a more elegant, less sporty companion to Omega's dive watches — offered across a wide range of quartz and mechanical configurations, and revamped several times before the current generation launched at Baselworld 2017. That 2017 redesign is the one collectors generally regard as the line hitting its stride.

Two changes drove it. The date window moved from 3 o'clock to 6 o'clock, and the "water-resistance" wording was removed from the dial and engraved on the caseback instead — minor alterations individually, but together they make a surprising difference, giving a more balanced, symmetrical dial that echoes the symmetry of the case. Anyone who has handled a pre-2017 Aqua Terra alongside this generation understands the point immediately.

The teak pattern itself remains the collection's signature. The horizontal grooves are drawn from the wooden decks of luxury sailboats — a genuine link to the maritime heritage the Seamaster name rests on, rather than a decorative flourish invented in a marketing meeting. On the grey dial, that texture does more work than usual: with less colour to carry the design, the light-catching ridges and the blued handset become the whole visual proposition.

Within the current 41 mm family, grey sits alongside black, silvery, blue and green as one of the quieter options. It is not a limited edition and we make no rarity claim for it — but it is a configuration encountered less often on the secondary market than the blue and black dials that dominate the line.

🌟 Technical Provenance

The calibre 8900 is the reason this watch behaves differently from most 41 mm steel sports watches at its level. It is Master Chronometer-certified by METAS, highly resistant to magnetism, equipped with a co-axial escapement and a silicon hairspring, and beats at 25,200 vibrations per hour. The movement is unaffected by exposure to strong magnetic fields, even those greater than 1.5 tesla (15,000 gauss) — which, in a world of laptop speakers, magnetic phone mounts, tablet covers and induction hobs, has stopped being a theoretical advantage.

The architecture matters too. The 41 mm model uses the larger two-barrel calibre 8900, with a 60-hour power reserve and a practical time-zone function — the hour hand jumps independently in one-hour steps, so a traveller can reset local time without disturbing the minutes or seconds. Finishing is classic Omega: Geneva waves in arabesque, blackened screws, barrels and balance wheel, with rhodium-plated rotor and bridges, visible through the sapphire display back.

METAS certification is worth understanding rather than skimming past: it tests the fully cased watch, not just the loose movement, across magnetic exposure, water resistance, power reserve and daily precision. Our own measurement of this example — -1 second per day with 345 degrees of amplitude — is a single reading taken at BST and not a warranty of future performance, but it is consistent with a movement in sound running order.

🧾 From the Case File

At 41 mm with a symmetrical case and lyre lugs, this is the Aqua Terra size most people mean when they picture the watch: substantial enough to read as a modern steel sports piece, restrained enough to disappear under a shirt cuff. With 150 metres of water resistance and a screw-in crown, it swims, showers and travels without special handling.

The practical case for this particular example is straightforward. It is a 2023 watch with its Box, Papers, and Cards, on its factory steel bracelet, with a dated warranty card that may still place it inside Omega's five-year factory coverage — and it wears its history openly. The visible wear on the bracelet, case and polished bezel is exactly why a buyer would choose it over a pristine example: the cost of entry is lower, the watch is already broken in, and the first inevitable desk-diving scratch will not cause a moment's grief.

The polished bezel is the element that shows wear most readily on this reference, and it does here. Buyers who prize an untouched, sharp-edged case should look elsewhere in our inventory. Buyers who want a mechanically sound, fully documented, genuinely wearable modern Omega — one they can put on a bracelet, adjust to an approximately 7¾-inch wrist, and simply use — will find this example well suited.

🗝️ BST Verdict

A 2023 Aqua Terra 41 in the least-shouted-about of its dial colours, carrying Omega's twin-barrel Master Chronometer calibre 8900 and a complete set of Box, Papers, and Cards.

Honest wear, honest description, and a reading of -1 second per day on our timing machine. This is a watch bought to be worn rather than stored, and priced condition permitting, it is one of the more sensible routes into the current-generation Aqua Terra.

👉 Every case deserves a closer look.