Omega · Aqua Terra

Strap for Seamaster Aqua Terra 150M Master Co-Axial 38.5 Red Gold / Diamond / MOP

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter39 mm
Reference231.58.39.21.55.001 (aka: 23158392155001)
FamilyAqua Terra
MovementOmega caliber 8501 hours, minutes, seconds | date | chronometer, co-Axial escapement
Year2015
CaseRed Gold

Recommended spring bar

Spring bars Omega 20mm — 1.8mm diameter

Technical match for lug width and diameter · lug 20 mm · Ø 1.8 mm

All Omega spring barsOpen →

Straps for the Aqua Terra 231.58.39.21.55.001 (aka: 23158392155001)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Aqua Terra 231.58.39.21.55.001 (aka: 23158392155001), seen from the bench

The Aqua Terra is part of Omega's Seamaster collection and represents the brand's sporty-elegant line. It is powered by the automatic caliber 8501 with Co-Axial escapement and chronometer certification. The model offers hour, minute, second and date indication.

Frequently asked questions

What is the lug width of the Omega Aqua Terra 231.58.39.21.55.001?

The lug width of the Omega Aqua Terra 231.58.39.21.55.001 is 20mm. This is the distance between the two metal lugs on the case where the bracelet attaches. Any strap with a 20mm lug width is fully compatible with this model.

Which strap pairs best with the Aqua Terra in red gold 231.58.39.21.55.001?

For the Aqua Terra in red gold, we recommend straps in medium brown alligator or shell cordovan, which enhance the warmth of the case without tonal conflicts. Black remains the formal and versatile choice. For those seeking personality, a reddish-brown (bordeaux) creates a sophisticated monochromatic effect that echoes the golden undertone of the case.

How do you change the strap on an Omega Aqua Terra with 20mm lugs?

The operation requires a spring bar tool to compress the springs of the internal lugs. Gently extract the spring from the first lug, slide off the bracelet, then insert the spring into the new strap. If you do not have the tools, a professional watchmaker will complete the operation in minutes without damage.

Can I use an aftermarket strap compatible with my Aqua Terra 231.58.39.21.55.001?

Yes, any strap with a 20mm lug width is compatible with this model. Custom-made straps crafted by specialized ateliers guarantee superior construction quality and noble materials compared to generic straps, preserving the prestige of the watch.

How long does a leather strap last on a daily-worn watch?

A quality leather strap, whether vegetable-tanned or shell cordovan, typically lasts 3-5 years with daily use. Durability depends on exposure to moisture, perspiration, and cleaning frequency. Artisanal straps with an 18-month warranty offer protection and the possibility of professional restoration after natural wear.

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