Omega · Seamaster Planet Ocean

Strap for Seamaster Planet Ocean 600M Co-Axial 42 Stainless Steel / Orange / Alligator Short

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
Reference2909.50.48 (aka: 29095048)
FamilySeamaster Planet Ocean
MovementOmega caliber 2500 Hours, Minutes, Seconds | Date | Co-Axial Escapement, Chronometer
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 Seamaster Planet Ocean 2909.50.48 (aka: 29095048)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Seamaster Planet Ocean 2909.50.48 (aka: 29095048), seen from the bench

The Seamaster Planet Ocean 2909.50.48 is a 42mm stainless steel diving instrument embodying 70 years of Omega's marine heritage. Powered by the Caliber 2500 Co-Axial Chronometer movement, it delivers ±4 seconds per day precision and features 600m water resistance with a unidirectional bezel and scratch-resistant sapphire crystal. The 20mm lug width requires proportionally sized straps that enhance the robust case authority while maintaining visual balance.

Frequently asked questions

What is the lug width of the Omega Seamaster Planet Ocean 2909.50.48?

The Seamaster Planet Ocean 2909.50.48 has a lug width of 20mm. This width is specific to this model and is essential for selecting compatible straps. You can verify it by measuring the opening between the terminal lugs of the case with a digital caliper: the value must correspond exactly to 20mm.

What is the best strap for the Seamaster Planet Ocean 2909.50.48?

The choice depends on usage and aesthetic preferences. For nautical elegance, vegetable-tanned Nile alligator offers a tactile grain that harmonizes with the satin-brushed steel. For frequent ocean environments, shell cordovan guarantees moisture resistance. Rubber or NATO straps are ideal for those emphasizing the sub-aquatic identity. Milanostraps offers all these options in 20mm size, customizable according to your wrist and color preferences.

How do you change the strap on the Seamaster Planet Ocean 2909.50.48?

The Seamaster Planet Ocean 2909.50.48 uses a spring bar system. To remove the original strap, position the watch with the caseback facing upward, locate the small lateral openings at the lug positions, insert a strap removal tool (or a toothpick), gently press the spring bar downward to disengage it from the locking holes. Repeat on the other side. To install the new strap, align the 20mm bars with the lug holes and press until you hear the locking click.

Is the strap on the Seamaster Planet Ocean 2909.50.48 compatible with other Omega watches?

Not universally. The Seamaster Planet Ocean 2909.50.48 requires straps with a 20mm lug width. Although many Omega watches use this width (such as some Seamaster Diver and Chronograph models), it is essential to verify the technical specifications of your model before purchasing. Milanostraps provides complete compatibility details for every strap in the 20mm category.

How long does a leather strap last on the Seamaster Planet Ocean 2909.50.48?

A leather strap of artisanal quality, such as those offered by Milanostraps, lasts on average 3-5 years with moderate use (3-4 times per week) and proper maintenance. Noble materials such as alligator with vegetable tanning and shell cordovan age by developing a fascinating patina, prolonging the aesthetic life of the strap. For the Seamaster Planet Ocean, which often faces humid environments, we recommend drying the strap after water contact and replacing it promptly if it shows signs of deformation or structural deterioration. Casati Milano offers an 18-month warranty on all straps handcrafted in the atelier.

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