Omega · Seamaster Planet Ocean
Strap for Seamaster Planet Ocean 600M Co-Axial 45.5 Master Chronometer Chronograph Sedna Gold / Black / Alligator
Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Seamaster Planet Ocean 215.63.46.51.01.001 (aka: 21563465101001)
Selected for the 22 mm lug width · workshop selection
Natural Calfskin NATO Strap€80
Black Calfskin NATO Strap 20mm€80
Grand Cavalier Military Brown Leather Strap€120
Dark Brown Calfskin Military Strap€80
Novonappa Black Military Style Strap for IWC Pilot€155
The Seamaster Planet Ocean 215.63.46.51.01.001 (aka: 21563465101001), seen from the bench
Frequently asked questions
What is the lug width of the Omega Seamaster Planet Ocean 215.63.46.51.01.001?
The Omega Seamaster Planet Ocean in reference 215.63.46.51.01.001 is equipped with a 22mm lug width. This measurement is determined by the proportions of the 45.50mm case and the need to distribute weight in a balanced manner. To verify the lug width of your watch, measure the distance between the two lugs protruding from the case: you will find exactly 22 millimeters of free space.
What is the best strap type for the Planet Ocean 215.63.46.51.01.001 in Sedna Gold?
For a Seamaster Planet Ocean in Sedna Gold, alligator remains the ideal choice from an aesthetic balance perspective. The natural grain texture reflects light in a manner similar to the case polish, creating visual continuity. Black or Havana brown alligator offers the formal contrast this watch deserves. Alternatively, shell cordovan in burgundy or brown develops a fascinating patina over time, perfect for those who view the Planet Ocean as a long-term investment.
How do you change the strap on an Omega Seamaster Planet Ocean?
The strap on the Omega Seamaster Planet Ocean 215.63.46.51.01.001 is changed by removing the two spring bars that secure it to the case. Position the watch on a stable support, identify the spring bars at 12 and 6 o'clock (or at 9 and 3, depending on orientation), and use a dedicated removal tool or small screwdriver to push the spring bars outward. Once removed, the old strap lifts away freely. Insert the spring bars into the new 22mm strap, align them with the case holes and push until they click into position. If you are not experienced, consult a professional.
Which aftermarket 22mm straps are compatible with this Seamaster?
Any strap made with a 22mm lug width is compatible with the Omega Seamaster Planet Ocean 215.63.46.51.01.001. On Milano Straps you will find a complete selection of straps in alligator, calf, shell cordovan and rubber, all customizable in length, color and finishes. It is essential to verify that the lug width is exactly 22mm and that the leather thickness is proportioned to the case dimensions (1.4-1.6mm recommended for correct aesthetics).
How long does a leather strap last on a watch like the Planet Ocean?
The lifespan of a leather strap on a Seamaster Planet Ocean depends on the quality of the leather, usage and environmental conditions. High-quality alligator with vegetable tanning lasts on average 3-4 years of daily use, provided prolonged exposure to fresh water is avoided. Mineral-tanned alligator is more resistant to moisture but develops less aesthetic patina. Shell cordovan can last up to 5-6 years thanks to the natural density of the leather, while a rubber strap maintains functionality for 4-5 years. Proper maintenance (quick drying, occasional conditioning) significantly extends useful life.
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

