Omega · Aqua Terra

Strap for Seamaster Aqua Terra 150M Co-Axial 34 Red Gold / Black

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width18 mm
Case diameter34 mm
Reference231.53.34.20.01.002 (aka: 23153342001002)
FamilyAqua Terra
MovementOmega caliber 8521 Hours, Minutes, Seconds | Date | Chronometer, Co-Axial Escapement
CaseRed Gold

Recommended spring bar

Spring bars Omega 18mm — single diameter

Technical match for lug width and diameter · lug 18 mm · Ø 1.8 mm

All Omega spring barsOpen →

The Aqua Terra 231.53.34.20.01.002 (aka: 23153342001002), seen from the bench

The Aqua Terra represents the sporty-elegant collection of Omega, characterized by the automatic caliber 8521 with Co-Axial escapement and chronometer certification. The timepiece indicates hours, minutes, seconds and date through a precision mechanism developed internally by the Swiss manufacture. The 231.53.34.20.01.002 reference is distinguished by the robust construction and water resistance typical of the Seamaster line.

Frequently asked questions

What is the lug width of the Omega Aqua Terra 231.53.34.20.01.002?

The lug width of the Omega Aqua Terra 231.53.34.20.01.002 is 18mm. This width is standard for the 34mm model version and it is essential to verify it before ordering an aftermarket strap, as other models in the same collection may use 20mm.

What strap material do you recommend for this Red Gold Aqua Terra?

For the Aqua Terra 231.53.34.20.01.002 in Red Gold, we recommend burnt cognac alligator or shell cordovan strap for aesthetic coherence with the case material. For water use, high-quality marine rubber ensures grip and longevity. Dark brown vegetable-tanned calf offers urban versatility while maintaining elegance.

How do you change the strap on this watch?

To change the strap, you need to remove the spring bars that hold the bracelet or strap in the lugs. Using a dedicated tool or small screwdriver, gently push the spring to release it from one side, extract the old strap and insert a new one of the same width (18mm) until the spring locks into place. If you are uncertain, Casati Milano offers the strap change service by appointment.

Is calf leather compatible with saltwater use?

Standard calf leather is not ideal for prolonged saltwater exposure. If you intend to wear the Aqua Terra 231.53.34.20.01.002 in marine environments frequently, opt for an alligator or shell cordovan strap, which offer greater density and resistance. For true nautical use, marine rubber remains the most reliable technical choice, with a lifespan of 6-8 years of intensive use.

How long does a leather strap last on a watch with this frequency of use?

A quality leather strap (alligator, cordovan, or vegetable-tanned calf) on a daily-wear watch typically lasts 3-5 years. Lifespan depends on moisture exposure, maintenance frequency, and treatment. The Casati Milano atelier offers an 18-month warranty on bespoke straps, with the possibility of restoration and regeneration afterwards.

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.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only