Omega · Aqua Terra

Strap for Seamaster Aqua Terra 150M Co-Axial 30 Yellow Gold / MOP / Bracelet

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

Lug width18 mm
Case diameter30 mm
Reference231.50.30.20.55.002 (aka: 23150302055002)
FamilyAqua Terra
MovementOmega caliber 8521 hours, minutes, seconds | date | chronometer, co-Axial escapement
CaseYellow 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 →

Straps for the Aqua Terra 231.50.30.20.55.002 (aka: 23150302055002)

Selected for the 18 mm lug width

All 18 mm straps →

The Aqua Terra 231.50.30.20.55.002 (aka: 23150302055002), seen from the bench

The Omega Seamaster Aqua Terra 231.50.30.20.55.002 is a 30mm yellow gold watch combining sports functionality with timeless elegance. Powered by the Omega caliber 8521 co-axial movement, it features a refined dial with hours, minutes, seconds, and date. The case is crafted in 18k yellow gold, offering both tactile luxury and durability. With an 18mm lug width, this model allows for personalized strap options while maintaining the sophisticated aesthetic that characterizes the Aqua Terra collection.

Frequently asked questions

What is the lug width of the Omega Aqua Terra 231.50.30.20.55.002?

The lug width is 18mm. This is the distance between the two case lugs where the strap attaches. It is essential to choose straps compatible with this exact measurement to ensure a secure and proportionate fit.

Which strap is best suited for the Omega Aqua Terra 30mm yellow gold?

Chocolate brown alligator or vegetable-tanned round calf are the most harmonious choices with the warmth of gold. For formal occasions, black shell cordovan creates a sophisticated contrast. The choice depends on frequency of use and wearing context: everyday elegance versus occasional wear.

How do you change the strap on the Seamaster Aqua Terra 231.50.30.20.55.002?

It is necessary to remove the lugs from the case using a dedicated spring bar tool. After extracting the small springs that secure the lug, you can remove the worn strap and insert the new one. It is recommended to perform this operation with care to avoid scratching the yellow gold case.

Can I use an artisanal aftermarket strap on this Omega?

Yes, provided the lug width is precisely 18mm. Artisanal straps from specialized manufacturers guarantee mechanical compatibility and superior material quality compared to generic straps. We recommend premium leathers such as alligator, vegetable-tanned calf or shell cordovan.

How long does a leather strap last on a watch like this?

A quality leather strap, with vegetable tanning and artisanal finishing, has a lifespan of 3-5 years with daily wear. Longevity depends on frequency of use, exposure to moisture and maintenance care. Premium straps with vegetable tanning develop a natural patina that enhances their appearance over time.

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 →

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