Omega · Aqua Terra

Strap for Seamaster Aqua Terra 150M Co-Axial 41.5 Red Gold / Grey / Bracelet

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

Lug width20 mm
Case diameter42 mm
Reference231.50.42.21.06.001 (aka: 23150422106001)
FamilyAqua Terra
MovementOmega caliber 8501 hours, minutes, seconds | date | chronometer, co-Axial escapement

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 231.50.42.21.06.001 (aka: 23150422106001)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Aqua Terra 231.50.42.21.06.001 (aka: 23150422106001), seen from the bench

The Omega Seamaster Aqua Terra 231.50.42.21.06.001 is a 41.5mm stainless steel sports watch from the family rooted in 1950s nautical instruments. Powered by the Omega 8501 Co-Axial caliber with official METAS chronometer certification, it features a distinctive teak deck dial, black ceramic bezel, and integrated bracelet. With 20mm lug width, 150m water resistance, and screw-down crown, this timepiece balances formal elegance with maritime capability.

Frequently asked questions

What is the lug width of the Omega Aqua Terra 231.50.42.21.06.001?

The Omega Aqua Terra 231.50.42.21.06.001 has a lug width of 20mm. This parameter indicates the distance between the two anchor holes in the case where the spring bar of the strap is inserted. It is essential to verify this measurement before purchasing an aftermarket strap to ensure precise and secure fit.

Which strap pairs best with the Omega Aqua Terra 231.50.42.21.06.001?

Alligator leather in brown or black tones is the most sophisticated and versatile choice, enhancing the timepiece's nautical heritage. Vegetable-tanned calf leather in brown or black also offers elegance and practicality. For a sporty approach, fabric NATO straps or FKM rubber guarantee water resistance and quick strap changes.

How do I change the strap on an Omega Aqua Terra 231.50.42.21.06.001?

To change the strap, extract the spring bars using a dedicated tool or a thin flat screwdriver. Insert the tip into the lateral slot of the bar, compress the internal spring, and slide the bar out of the lug. Repeat on the other side, then install the new strap by inserting the spring bars into the anchor holes until you hear the closure click.

Can I use an aftermarket strap on an Omega Aqua Terra 231.50.42.21.06.001?

Yes, provided the strap is compatible with the 20mm lug width and features standard spring bars. Avoid straps with excessive thickness that could prevent proper seating in the case. Rely on specialized suppliers that guarantee precise tolerances and quality materials.

How long does a leather strap last on an Omega Aqua Terra 231.50.42.21.06.001?

A premium leather strap, such as alligator or shell cordovan, typically lasts 3-5 years with proper maintenance and regular use (4-5 days per week). Factors such as sun exposure, humidity, frequency of use, and care significantly impact longevity. A vegetable-tanned calf strap lasts 2-3 years. Casati Milano atelier offers an 18-month warranty on their artisanal straps.

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