Case #713 — Omega Seamaster Aqua Terra - Small Seconds Ref. 220.10.41.21.02.004

Case #713 — Omega Seamaster Aqua Terra 150M Small Seconds "Silvery-Blue Teak"

Ref. 220.10.41.21.02.004

Status: Available

Condition: Very Good Pre-Owned

Scope: Box, Papers, and Cards

Year: 2025

🔎 Case Notes

For nearly two decades the Aqua Terra was a watch defined by a central seconds hand sweeping across a teak-pattern dial. Then Omega moved the seconds down to six o'clock, folded the date into the subdial's lower edge, and quietly changed the entire balance of the face. This is that watch: the Seamaster Aqua Terra 150M Co-Axial Master Chronometer Small Seconds 41 mm in steel, reference 220.10.41.21.02.004.

The dial is the reason to look twice. The brushed silvery dial carries the horizontal "teak" pattern, with a date window at 6 o'clock and an opaline small seconds subdial ringed in rhodium plating, complemented by blued hands and indexes filled with white Super-LumiNova and sandblasted minutes and seconds tracks on both dial and subdial. In daylight the silver surface shifts constantly across the teak grooves while the blued hands and markers hold their colour — a two-tone effect that photographs flatly and reads beautifully in person.

Underneath sits Calibre 8916, a self-winding movement with Co-Axial escapement, certified Master Chronometer and approved by METAS, resistant to magnetic fields reaching 15,000 gauss, with a free sprung-balance, silicon balance spring, bidirectional automatic winding, and Small Seconds and Date displays at 6H. The case measures 41 mm across, 13.20 mm thick and 47.90 mm lug-to-lug, with 20 mm between the lugs — proportions that wear noticeably more compact than the thickness figure suggests, thanks to the domed crystal and the steeply turned-down lugs.

This example dates to 2025 and arrives as Box, Papers, and Cards. BST's inspection found it in beautiful pre-owned condition, with minor signs of wear present on the high-polish surfaces — the polished bevels and bracelet centre elements where ordinary handling always shows first. The brushed surfaces and dial present cleanly. It is graded Very Good Pre-Owned: a lightly used watch that has been worn, not abused. The bracelet is currently sized to fit an approximately 7½-inch wrist.

🕰️ The Evidence

• Reference: 220.10.41.21.02.004
• Model / Collection: Omega Seamaster Aqua Terra 150M Co-Axial Master Chronometer Small Seconds 41 mm
• Year: 2025
• Case: Stainless steel, polished and brushed, screw-in crown
• Case Diameter: 41 mm
• Thickness: 13.20 mm
• Lug-to-Lug: 47.90 mm
• Lug Width: 20 mm
• Dial: Brushed silvery-blue with horizontal "teak" pattern; blue indexes and hands with white Super-LumiNova; opaline small seconds subdial with rhodium-plated ring; date aperture at 6 o'clock
• Crystal: Domed scratch-resistant sapphire with anti-reflective treatment on both sides
• Bezel: Polished steel, fixed
• Caseback: Transparent sapphire with wave-edged design
• Movement: Omega Co-Axial Master Chronometer Calibre 8916
• Movement Type: Self-winding, automatic in both directions, free sprung-balance with silicon balance spring
• Certification: Master Chronometer, approved by METAS; resistant to magnetic fields reaching 15,000 gauss
• Power Reserve: 60 hours
• Functions: Hours, minutes, small seconds, date
• Water Resistance: 15 bar (150 metres / 500 feet)
• Bracelet: Stainless steel, polished and brushed
• Clasp: Butterfly clasp
• Bracelet Fit: Approximately 7½-inch wrist
• Condition: Very Good Pre-Owned — minor signs of wear on the high-polish surfaces
• Factory Warranty: Carries a 2025-dated Omega warranty card and should remain within Omega's five-year factory warranty period, subject to the exact warranty-card activation date and Omega's warranty terms
• Included: Box, Papers, and Cards

🌟 Collector Provenance

The Aqua Terra has always occupied an unusual position in the Seamaster family. It is the Seamaster that does not look like a dive watch — no rotating bezel, no helium valve, no overt tool-watch signalling — and yet it still carries 15 bar of water resistance, which is a great deal more than most dress-leaning sports watches can claim. That combination is precisely why the line has endured: it is Omega's answer to the integrated-feel daily watch without actually being an integrated-bracelet watch.

The Small Seconds references represent the most significant dial-architecture change the collection has seen since the teak pattern first appeared. Introducing a new function to the range required a new calibre, and Omega gave the Small Seconds its automatic Co-Axial Master Chronometer calibre 8916. The subdial occupies the lower third of the face, intersecting with the date aperture at 6 o'clock, with the seconds scale sandblasted to contrast against the dial. Collectors tend to split on this layout, and that is what makes it interesting: it asks the Aqua Terra to be read differently from the central-seconds versions that surround it on a dealer's tray.

Within the 41 mm steel family, the silvery dial with blue accents is the variant that most clearly separates itself from the solid-colour Aqua Terras. The blue is restricted to the hands, the indexes and the subdial scale, set against a neutral silver field — a lighter, dressier proposition than the blue-dial references, and considerably more distinctive than a plain silver dial would be. Buyers who want an Aqua Terra that is not simply "the blue one" tend to arrive here.

🌟 Technical Provenance

Master Chronometer certification is the specification that deserves the most attention, because it is the one most often skimmed past. It means the watch is antimagnetic to more than 15,000 gauss and runs within an average of 0 to +5 seconds per day — a standard measured on the fully cased watch rather than the bare movement, and administered by METAS rather than by the brand.

The antimagnetic architecture matters in daily life more than the number implies. Magnetic exposure from laptops, speakers, tablet covers and bag closures is the single most common cause of a mechanical watch suddenly running fast, and it is the one failure mode this calibre is engineered to ignore outright. The silicon balance spring and free sprung-balance are central to that design, alongside the rhodium-plated finish with Geneva waves in arabesque visible through the sapphire caseback.

The 60-hour power reserve is the practical complement: set it down Friday evening and it is still running Sunday. For a watch likely to rotate with others, that is the difference between resetting the date every week and not thinking about it at all.

🧾 From the Case File

On the wrist, this is a 41 mm watch that behaves like a smaller one. The 47.90 mm lug-to-lug is the figure to focus on rather than the diameter — it keeps the case within the bounds of most wrists in the 6¾ to 7¾-inch range, and the domed crystal visually absorbs part of the 13.20 mm height. The bracelet's butterfly clasp closes flush and keeps the underside of the wrist clean, which is part of why the Aqua Terra slides under a shirt cuff more easily than its specification sheet suggests.

The small seconds layout brings a quiet practical benefit as well: a running subdial at 6 o'clock tells you at a glance that the watch is alive, without a sweep hand drawing the eye across the dial. The date sits in the same visual zone, so timekeeping information is concentrated in one place and the upper two-thirds of the dial is left to the teak pattern.

This example's case is straightforward. It is a current-generation reference with a 2025 warranty card, complete with Box, Papers, and Cards, and sized for an approximately 7½-inch wrist. The wear BST recorded is confined to the high-polish surfaces — the areas that will accumulate the same marks on any steel sports watch within weeks of regular wear. For a buyer who intends to actually wear the watch rather than preserve it, a lightly used example with its full accompaniments and a recent warranty card is a rational place to start.

🗝️ BST Verdict

A modern Aqua Terra that earns its place through dial architecture rather than volume: silver teak, blue accents, a rhodium-ringed subdial and a date tucked into the seconds scale, all driven by a METAS-certified Co-Axial calibre with 60 hours of reserve and genuine magnetic immunity.

Very Good Pre-Owned, dated 2025, complete with Box, Papers, and Cards, carrying an Omega warranty card that should still be within the five-year period. A sensible way into a current reference that has been worn exactly as much as a watch like this ought to be.

👉 Every case deserves a closer look.