The Seamaster Aqua Terra 150M in this configuration is a compact steel automatic with time and date, rated to 150 metres of water resistance. It sits in the smallest case Omega builds the Aqua Terra in, a 30 mm size aimed at slimmer wrists, and carries a pine green sun-brushed dial set with diamond hour markers.
Omega introduced the 30 mm Aqua Terra as a new sub-collection in June 2025, the first time the Aqua Terra line had appeared in a 30 mm case. The launch spanned an initial group of twelve references across steel, two-tone, and solid gold, and was tied to Omega’s “My Little Secret” campaign rather than a watch fair.
The size arrived alongside two purpose-built movements, calibres 8750 and 8751, developed specifically for the smaller case and described by Omega as its smallest and slimmest Co-Axial Master Chronometer calibres to date. Steel and two-tone models use the 8750; solid gold models use the 8751.
The Aqua Terra line itself dates to 2002 and moved to Master Chronometer movements across the range from 2015. Within the current lineup this 30 mm steel model is a regular-production, entry-size piece rather than a limited edition, and it is priced above the plain-dial 30 mm steel variants because of its diamond markers.
More Aqua Terra Watches
Omega Seamaster Aqua Terra 150M Master Co-Axial Chronometer Blue Teak Dial Stainless Steel 41.5mm MINT CONDITION COMPLETE SET 231.10.42.21.03.003
Omega Seamaster Aqua Terra 150M "James Bond Spectre" Blue Dial Yellow Accents Stainless Steel 41.5mm MINT CONDITION COMPLETE SET 231.10.42.21.03.004
2026 NEW UNWORN Omega Seamaster Aqua Terra Green Sunburst Dial Diamond Markers Stainless Steel 30mm COMPLETE SET 220.10.30.20.60.001
Omega Seamaster Aqua Terra Worldtimer Blue Dial Blue Rubber Strap Stainless Steel 43mm MINT CONDITION COMPLETE SET 220.12.43.22.03.001
Omega Seamaster Aqua Terra Co-Axial White Dial Blue Accents Stainless Steel MINT CONDITION 2503.33.00
Omega Seamaster Aqua Terra 150M 41MM Blue Grey Dial Sedna Gold Rubber Strap COMPLETE SET EXCELLENT CONDITION 220.22.41.21.03.001
The dial is pine green, sun-brushed outward from the centre and finished with a tinted lacquer that gives it a sunburst play of light. A circular date window sits at 6 o’clock. The printed dial text reads OMEGA and Seamaster below 12 o’clock, with CO-AXIAL and MASTER CHRONOMETER stacked above the date, and SWISS MADE at the base.
The hour markers are 11 diamonds, set in 18K white gold holders, with the 6 o’clock position given over to the date aperture. Omega uses Top Wesselton white diamonds with clarity graded from pure to VVS. The faceted hands are also 18K white gold, with the minute hand tapering to a fine point, and the hands are filled with white Super-LumiNova that emits a blue glow.
The case is polished stainless steel in a symmetrical round profile, 30 mm across, 10.55 mm thick, and 36.50 mm from lug to lug. The proportions are set by the slim 8750 calibre inside, which allows a thinner case than earlier small Aqua Terra movements permitted.
The crystal is a domed scratch-resistant sapphire with anti-reflective treatment on both sides. The crown is polished steel and screws down, contributing to the 150 metre (15 bar) water resistance rating. The caseback is a screw-in sapphire exhibition back with a wave-edged surround, showing the movement through the glass.
The Aqua Terra has no rotating or functional bezel. The front of the case is a slim fixed polished steel edge framing the crystal, so the design reads as a clean dress-sport case rather than a tool-watch bezel.
The watch is fitted to an integrated stainless steel bracelet with rounded links in a mix of polished and brushed finishing. The bracelet attaches through Omega’s patented screw-and-pin system and is shaped to flow directly from the case.
It closes with a foldover butterfly clasp that has pushers on the cover. The clasp includes Omega’s easy comfort-adjustment system, giving 2 mm of on-the-fly length adjustment for fine-tuning the fit through the day. This exact reference is the steel-on-steel version; the same 30 mm case and pine green diamond dial are also offered in Moonshine gold on a matching gold bracelet under a separate reference.
The movement is the Omega Co-Axial Master Chronometer calibre 8750, a self-winding movement built specifically for the 30 mm case. It measures 20 mm in diameter and 3.98 mm thick.
It runs at 25,200 vph (3.5 Hz) with a 48 hour power reserve and winds in both directions. The escapement is Omega’s Co-Axial type, and the movement uses a free-sprung balance with a silicon balance spring. It is certified Master Chronometer by METAS, tested to the 0/+7 seconds per day standard and resistant to magnetic fields of 15,000 gauss.
Functions are hours, minutes, central seconds, and the date at 6 o’clock. The date is set through the crown. Finishing includes a rhodium-plated rotor and bridges decorated with arabesque Geneva waves, visible through the exhibition caseback.
The case and bracelet are 316L stainless steel, chosen for corrosion resistance and a high polish. The crystal is synthetic sapphire, treated for scratch resistance and glare, with a matching sapphire pane in the caseback.
The dial furniture is a step above the plain-dial variants: the applied hour-marker holders and the hands are 18K white gold, and the markers themselves are 11 Top Wesselton diamonds. Inside, the calibre uses a silicon balance spring for magnetic resistance.
The overall material character is a steel watch with precious dial furniture: a stainless case and bracelet carrying white gold and diamond detailing on the dial.
A full set for this reference, sold new in the current era, includes:
Older version
Newer version
No documented box-generation change has occurred during this reference’s short production life. On a full-set example the box that matters for completeness is the current retail presentation box the watch was originally delivered in.
The watch is sold with Omega’s 5-year international warranty, the standard coverage for Omega Master Chronometer pieces. Coverage is documented by the current Omega red card set, normally including the International Warranty, Master Chronometer, and Pictograms cards held in the document holder, completed, stamped, and dated by the selling boutique or authorised dealer at the point of sale.
Older version
Newer version
As a 2025-launched reference, original warranties remain in force on examples sold from launch onward. For full-set valuation the dealer-stamped, dated card is the primary authenticity document; a blank or unstamped card does not establish the sale date.
The 30 mm Aqua Terra remains part of Omega’s current catalogue, and this steel pine green diamond reference is an active, in-production model.
At 30 mm across, 36.50 mm lug to lug, and 10.55 mm thick, this is a small, close-fitting watch. It wears true to its dimensions, sitting compact on the wrist rather than reading larger than the case size suggests.
The 14 mm attachment width and integrated bracelet keep the whole piece contained and low, so it slips easily under a cuff. The butterfly clasp with 2 mm comfort adjustment lets the fit be tuned without removing links.
It suits smaller wrists in roughly the 13 to 16 cm range and is built as a dress-leaning everyday watch, with the diamond markers and white gold dial furniture placing it toward the more formal end of the Aqua Terra range while retaining the line’s 150 metre water resistance.
This reference is a single configuration: a 30 mm polished stainless steel case, pine green sun-brushed dial with 11 diamond hour markers in 18K white gold, date at 6 o’clock, integrated steel bracelet with butterfly clasp, and the Co-Axial Master Chronometer calibre 8750.
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