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 width22 mm
Case diameter46 mm
Reference232.18.46.21.01.001 (aka: 23218462101001)
FamilySeamaster Planet Ocean
MovementOmega caliber 8500 Hours, Minutes, Seconds | Date | Chronometer, 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 232.18.46.21.01.001 (aka: 23218462101001)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Seamaster Planet Ocean 232.18.46.21.01.001 (aka: 23218462101001), seen from the bench

The Seamaster Planet Ocean is equipped with the Omega 8500 automatic calibre with co-axial escapement and chronometer certification. The movement offers indication of hours, minutes, central seconds and date. 22mm lugs complete the technical configuration of the timepiece.

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.

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