Omega · Aqua Terra

Strap for Seamaster Aqua Terra 150M Master Chronometer 41 Stainless Steel / Summer Blue / 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 diameter41 mm
Reference220.10.41.21.03.005 (aka: 22010412103005)
FamilyAqua Terra
MovementOmega caliber 8900 Hours, Minutes, Seconds | Date | Chronometer, Co-Axial Escapement
CaseStainless 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 220.10.41.21.03.005 (aka: 22010412103005)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Aqua Terra 220.10.41.21.03.005 (aka: 22010412103005), seen from the bench

The Aqua Terra mounts the automatic Omega caliber 8900 with Co-Axial escapement and chronometer certification. The movement offers hour, minute, second and date indications. The watch features 20mm lugs for the strap.

Frequently asked questions

What is the lug width of the Omega Aqua Terra 220.10.41.21.03.005?

The Omega Aqua Terra 220.10.41.21.03.005 features a 20mm lug width. This measurement represents the distance between the inner shoulders of the case lugs and is strictly compatible with straps specifically designed for this width.

Which strap do you recommend for the 220.10.41.21.03.005?

For this model we recommend alligator straps (American belly for formal wear), vegetable-tanned calfskin for everyday versatility, or rubber/nylon to preserve the underwater heritage. The pairing depends on your lifestyle: formal suggests cognac alligator, active suggests structured rubber.

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

The 220.10.41.21.03.005 uses internal screw attachments. Remove the original strap by gently unscrewing the small lateral screws with an appropriate screwdriver. Measure the lug width with a caliper (20mm) and ensure that the new strap respects this width. Reinstall the screws with uniform tension, without forcing.

Can I use an aftermarket strap compatible with the 220.10.41.21.03.005?

Yes, absolutely. Artisanal 20mm straps are fully compatible with this model. We recommend verifying that the new strap offers minimal tolerance relative to the lugs and that the material is certified quality (vegetable leather, genuine alligator, marine-grade rubber) to maintain the watch's reputation.

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

A quality artisanal leather strap for your 220.10.41.21.03.005 typically lasts 3-5 years with moderate daily use. Durability depends on moisture exposure, UV rays, and tanning quality. Vegetable leather develops a natural protective patina, while alligator offers greater resistance over time. Casati Milano guarantees 18 months on made-to-measure 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.

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