Technical Archive

Omega
Aqua Terra 231.20.39.21.52.003— lug 0mm

Omega Aqua Terra 231.20.39.21.52.003: strap made to measure on the watch at the Casati Milano atelier, by appointment.

Seamaster Aqua Terra 150M Co-Axial 38.5 Stainless Steel / Red Gold / Silver / Bracelet

Artisanal Note

"This model requires a precise 0mm lug width to preserve the original sartorial balance."

Technical Specifications

Omega 231.20.39.21.52.003
Lug Width
0 mm

The essential strap measurement.

Browse 0mm straps →
Reference

231.20.39.21.52.003

Movement

Omega caliber 8500 Hours, Minutes, Seconds | Date | Chronometer, Co-Axial Escapement

The Heritage

The Aqua Terra is part of Omega's Seamaster collection and represents the brand's sporty-elegant line. It features the automatic Caliber 8500 with Co-Axial escapement and chronometer certification. The model offers hour, minute, second and date indication.

FAQ

Can I fit a standard strap on the Omega Aqua Terra 231.20.39.21.52.003?

No, the bracelet is integrated directly into the case — there are no standard lugs where a regular strap would fit. I've seen many owners disappointed by this, but in our workshop I craft a bespoke strap tailored to your case geometry without modifying the watch itself.

How does the bespoke strap process work for this Aqua Terra?

I work exclusively at <a href="/pages/casati-booking">Casati Milano</a>, by appointment only. I measure your case directly — the lugs, the shoulders, the angles — then build the attachment with millimetre precision so the strap seats smoothly and securely, no force needed.

Which leather would you recommend for the Aqua Terra?

I favour Barenia brown: the warmth of the leather naturally echoes the rose gold and gives it that sport-elegant character Omega intended. If you prefer something understated, Mississippi Alligator in grey is striking, but Barenia is what I see worn with most confidence.

How long does a properly made strap last?

With daily wear and basic care — keep it away from direct sun, protect it from salt water if you wear it at sea — a good leather lasts 4 to 5 years. If your watch matters to you, a gentle clean now and then and light conditioning keeps it supple. Leather ages beautifully: it darkens, it gains character, it tells a story.

The Aqua Terra has the 'Teak Concept' design you mention — what does that mean for the wearer?

Gerald Genta drew from luxury yacht decks: fine grid patterns on the bezel that echo teak wood. For the wearer, it means this watch is built for the sea, for water, yet keeps elegance on land. A strap that respects this dual nature — neither too sporty nor too formal — is what I aim to build.

The next step

The right strap isn’t chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

Request an appointment →

By appointment only · Milan

The atelier's website: casatimilano.com