Omega Seamaster Aqua Terra, 39.2mm, Co-Axial Calibre 2500 automatic, COSC-certified chronometer, 2503.30

The Omega Seamaster Aqua Terra 2503.30 pairs a silver dial with a 39.2mm stainless-steel case and matching bracelet. Its smooth bezel, applied hour markers and date window at 3 o’clock give this early Aqua Terra a clean, restrained appearance. The design balances the Seamaster collection’s sporting heritage with an elegance that works equally well with tailoring and everyday clothing.

Powering the watch is the Omega Co-Axial Calibre 2500, a chronometer-certified automatic movement with a 48-hour power reserve. Its Co-Axial escapement represents an important chapter in Omega’s mechanical watchmaking, reducing sliding friction within the escapement. Visible through the exhibition caseback, the movement adds technical interest to a watch designed around straightforward daily practicality.

Specifications

• Brand: Omega

• Model: Seamaster Aqua Terra Co-Axial

• Reference: 2503.30 / 2503.30.00

• Movement: Omega Co-Axial Calibre 2500 automatic, COSC-certified chronometer

• Case Material: Stainless steel

• Dial: Silver

• Case Size: 39.2mm

• Bezel: Smooth stainless steel

• Crystal: Scratch-resistant sapphire

• Caseback: Exhibition, screw-down

• Bracelet / Strap: Stainless-steel bracelet

• Wrist Size: Fits up to 19.5cm

• Water Resistance: 150m – not guaranteed due to age

• Power Reserve: 48 hours

• Production Period / Year: Circa 2000s; individual year unspecified

• Functions: Hours, minutes, seconds and date

• Accessories: box and papers

• Condition: A few traces of usage, some scratches can be seen but overall in very good condition

• Availability: Available through our Global Concierge Sourcing Service

Key Features

• Co-Axial Calibre 2500 — Chronometer-certified automatic movement with a 48-hour power reserve.

• Silver Dial — A restrained layout with applied markers and a practical date display.

• 39.2mm Case — Versatile proportions that balance sporting presence with everyday comfort.

• Sapphire Crystal and Exhibition Back — Scratch-resistant dial protection with a view of the automatic movement.

• Early Aqua Terra Design — Clean styling from the collection’s first generation, accompanied by box and papers.

For someone seeking an understated Swiss automatic, the Aqua Terra 2503.30 offers an appealing blend of silver-dial elegance and Seamaster character. Supplied with box and papers, this example is available through our Global Concierge Sourcing Service.

Style is Timeless.