Omega Seamaster Aqua Terra 150M Co-Axial Chronometer Annual Calendar 38.5mm Stainless Steel Red Gold Grey Dial Steel Red Gold Bracelet 231.20.39.22.06.001 - BRAND NEW

The Omega Seamaster Aqua Terra 150M is one of the most versatile and enduring lines in the Seamaster family, conceived to bridge the gap between a true sport diver and a refined dress watch. Introduced in the early 2000s, the Aqua Terra quickly earned a reputation for its distinctive teak-pattern dial — a nod to the wooden decking of luxury sailing yachts — its sporty yet elegant case proportions, and its robust, daily-wear credentials. Reference 231.20.39.22.06.001 represents one of the most complication-rich expressions of the line, elevating the Aqua Terra concept with an annual calendar function that appeals to the discerning collector as much as to the dedicated daily wearer.

At 38.5mm in diameter, the case of this Aqua Terra occupies a sweet spot that suits a broad range of wrist sizes without sacrificing presence. The stainless steel construction is enriched by red gold elements — most prominently on the bezel and carried through to the two-tone steel and red gold bracelet — creating a warm, luxurious contrast that elevates the watch well beyond a typical sport reference. The result is a timepiece that reads as polished and considered in a boardroom setting while remaining entirely at home in a marina or at a casual weekend gathering.

The grey index dial is a masterclass in restrained elegance. Applied indices — highlighted in red gold to match the bezel and bracelet — punctuate the dial with precision, while the annual calendar display provides genuine functional depth. An annual calendar is one of the most practical complications available in a mechanical watch: it requires only a single manual date correction per year, at the turn of February, making it far more convenient than a simple date display while remaining less mechanically complex — and less costly — than a perpetual calendar. For the buyer who wears their watch every day and values accuracy alongside beauty, this complication is a compelling proposition.

Powering the watch is an Omega Co-Axial Chronometer movement, a designation that carries significant weight in the industry. The Co-Axial escapement, developed by master watchmaker George Daniels and adopted by Omega, reduces friction at the escapement level, contributing to long-term rate stability and extending service intervals compared with traditional lever escapements. Chronometer certification means the movement has passed rigorous independent timing tests, guaranteeing precision performance across a range of temperatures and positions. Buyers investing in reference 231.20.39.22.06.001 are acquiring not just a beautiful object but a mechanically distinguished instrument.

Wrist presence on the Aqua Terra 150M at 38.5mm is quietly commanding. The two-tone palette of steel and red gold gives the watch a sense of occasion without the ostentation of a full yellow or rose gold case, and the grey dial provides a cool, neutral backdrop that reads differently under various lighting conditions — sometimes silvery and understated, sometimes graphite-rich and dramatic. The bracelet, blending brushed steel links with red gold accents, ensures the transition from case to wrist feels seamless and cohesive, a hallmark of thoughtful Swiss design at this level.

Bizak & Co. is pleased to offer this reference 231.20.39.22.06.001 in brand-new condition, meaning it arrives unworn, in full factory specification, with Omega's manufacturer warranty intact. For collectors seeking an Omega Seamaster Aqua Terra Annual Calendar for sale from a trusted dealer, or for buyers who want to buy online with confidence, Bizak & Co. provides transparent pricing, expert authentication, and dedicated after-sale support. Reach out to our team to confirm current availability, discuss pricing, or arrange purchase — we are here to help you acquire this exceptional timepiece with complete peace of mind.