Omega · Aqua Terra

Strap for Seamaster Aqua Terra 150M Co-Axial 36.2 Stainless Steel / Red Gold / Diamond / MOP / 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 diameter36 mm
Reference2309.75.00
FamilyAqua Terra
MovementOmega caliber 2500 hours, minutes, seconds | date | co-Axial escapement, chronometer
Year2003
CaseMother of Pearl | Red Gold, Stainless Steel

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 2309.75.00

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Aqua Terra 2309.75.00, seen from the bench

The Omega Seamaster Aqua Terra 2309.75.00 is a 36.2 mm stainless steel and red gold bicolor sports watch featuring a mother-of-pearl dial and Co-Axial 2500 movement. The case combines 18k red gold on the back, crown and lugs with stainless steel on the body, offering 150 meters water resistance and a 20 mm lug width for strap compatibility.

Frequently asked questions

What is the lug width of the Omega Aqua Terra 2309.75.00?

The lug width of the Omega Aqua Terra 2309.75.00 is exactly 20 millimetres. This measurement must be taken at the internal seat of the case, at the lug attachment point, using a digital calliper. It is a constructive specification that determines complete compatibility with all 20mm aftermarket straps.

What strap do you recommend for the Omega Aqua Terra 2309.75.00?

We recommend a cognac alligator strap with vegetable tanning to enhance the rose gold and mother-of-pearl, or bordeaux shell cordovan with a handcrafted deployant for those desiring a vintage patina. For everyday wear, medium-bronze structured calf offers versatility without sacrificing elegance. The choice depends on use: formal, sporty, or mixed.

How do I change the strap on my Omega Aqua Terra 2309.75.00?

To change the strap, use a spring bar removal tool or consult a professional. Insert the tip of the tool into the small lateral hole of the lug, apply gentle pressure to compress the internal spring, then extract the lug from the case. Repeat on the other lug. Installation of the new strap follows the reverse procedure.

Can I use aftermarket straps on my Aqua Terra 2309.75.00?

Yes, completely compatible. The Aqua Terra 2309.75.00 is fitted with 20 millimetre lugs, a standard measurement that allows the use of any quality aftermarket strap with the same lug width. Always verify that the strap is constructed for this specific lug width.

What is the lifespan of a natural leather strap on this watch?

A natural leather strap (alligator, calf, shell cordovan) typically lasts 3–5 years with daily use, depending on the quality of the tanning and climatic conditions. Leather fears persistent humidity and salty perspiration. We recommend rotating the strap with alternatives every 2–3 months and treating it regularly with specific conditioners. A technical nylon NATO strap reaches 7–10 years without significant degradation.

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