Omega · Seamaster Planet Ocean
Strap for Seamaster Planet Ocean 600M Co-Axial 45.5 Stainless Steel / Diamond / 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 232.18.46.21.01.001 (aka: 23218462101001)
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 232.18.46.21.01.001 (aka: 23218462101001), seen from the bench
Frequently asked questions
What is the lug width of the Omega Seamaster Planet Ocean 232.18.46.21.01.001?
The lug width is 22mm. This specification is crucial for online strap purchases: not all dive watches share this width, so you must always verify that the strap is specifically designed for 22mm to avoid excessive cutting or poorly proportioned lugs.
What is the best material for a strap to pair with the Seamaster Planet Ocean 232.18.46.21.01.001?
It depends on use: for formal-smart casual contexts, vegetable-tanned alligator offers elegance and natural aging. For actual diving, FKM rubber or NATO straps are preferable as they do not rot in salt water. Japanese shell cordovan represents the most prestigious compromise, developing an authentic patina over time.
How do you change the strap on a Seamaster Planet Ocean?
The process requires a spring bar tool to access the spring pins at the strap ends. Position the tool in the small hole of the spring, compress toward the center of the case and extract the pin. Repeat on the other side, then remove the old strap and insert the new one. Verify that the spring clicks correctly into the seat to prevent loss during use.
Are there compatible and reliable aftermarket straps for the 232.18.46.21.01.001?
Yes, Milano Straps offers a selection of 22mm straps ready to ship, customizable in size, initials and choice of stitching thread. For a complete bespoke experience, the Casati Milano atelier creates custom straps with personal leather selection, WhatsApp updates and 18-month warranty.
How long does a leather strap last on a dive watch like the Seamaster Planet Ocean?
Durability depends on material and use: vegetable-tanned alligator resists 3-5 years with ordinary maintenance (drying after moisture contact). Calf is more sensitive to water, while shell cordovan can last 7-10 years if protected from prolonged humidity exposure. In frequent salt environments, switching to rubber or NATO strap extends the life of the leather strap.
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

