Omega · Seamaster Planet Ocean

Strap for Seamaster Planet Ocean 600M Co-Axial 45.5 Chronograph Stainless Steel / Orange / Alligator

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter46 mm
Reference2918.50.38 (aka: 29185038)
FamilySeamaster Planet Ocean
MovementOmega caliber 3313 Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel | Co-Axial Escapement
CaseStainless Steel

Recommended spring bar

Spring bars Omega 22mm — 1.8mm diameter

Technical match for lug width and diameter · lug 22 mm · Ø 1.8 mm

All Omega spring barsOpen →

Straps for the Seamaster Planet Ocean 2918.50.38 (aka: 29185038)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Seamaster Planet Ocean 2918.50.38 (aka: 29185038), seen from the bench

The Seamaster Planet Ocean features the automatic Caliber 3313 with chronograph functions, co-axial escapement, and column-wheel. The movement provides indication of hours, minutes, small seconds, date, and chronograph. The watch has 22mm lugs for the strap.

Frequently asked questions

What is the lug width of the Omega Seamaster Planet Ocean 2918.50.38?

The Omega Seamaster Planet Ocean 2918.50.38 has an exact lug width of 22mm. This width is determined by the distance between the lugs of the case and represents the correct size for any strap you wish to pair with this model. Always verify the measurement with a caliper before purchasing an aftermarket strap.

What is the best strap for the Omega Seamaster Planet Ocean 2918.50.38?

There is no absolute 'best', but straps in Tuscan vegetable tanning or alligator leather naturally complement this technical instrument. A tannic calf leather in Havana coloration or deep black enhances the grey dial while maintaining aesthetic coherence. For intensive water use, a vulcanized rubber strap guarantees practicality and longevity. Your choice depends on your primary use and personal color palette.

How do you change the strap on an Omega Seamaster Planet Ocean 2918.50.38?

Strap replacement requires a spring bar tool (a small pincer specifically designed for this purpose) and a few minutes of attention. Position the tool under the strap button, applying light downward pressure to compress the internal spring. The old strap will retract, allowing you to remove the lugs. Insert the new strap and verify that the buttons snap securely into place. If you prefer to avoid risk, an expert can change the strap in moments.

Does the Omega Seamaster Planet Ocean 2918.50.38 accept compatible aftermarket straps?

Yes, all straps designed for 22mm lug width are compatible with the 2918.50.38. Quality aftermarket straps—made from tannic leather, alligator, shell cordovan, or rubber—interface perfectly with the lugs without requiring modifications. Always purchase from specialized suppliers who guarantee correct sizing and artisanal finishing.

How long does a leather strap paired with the Omega Seamaster Planet Ocean 2918.50.38 last?

Durability depends on the material chosen and usage. A vegetable-tanned leather strap, with proper care, lasts 5-7 years with regular wear, developing a fascinating patina over time. Alligator offers superior resistance and can last 8-10 years. Vulcanized rubber, while less 'noble', lasts 7-9 years if not exposed to prolonged direct heat. Avoid extended immersion in seawater if you use untreated leather, and store the watch in a dry place when not wearing it.

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