Strap for Seamaster Planet Ocean 600M Co-Axial 42 Titanium / LiquidMetal / Bracelet

The Omega Seamaster Planet Ocean 232.90.42.21.03.001 is equipped with a 20mm lug width. This measurement indicates the distance between the two spring bars (lugs) that attach the strap to the case. A 20mm strap will fit perfectly, while different sizes (18mm or 22mm) will not be compatible. You can verify this manually by measuring the internal space between the case shoulders at the attachment point.

The choice of strap depends on intended use. For formal elegance: dark brown alligator or vegetable-tanned black calf leather. For water sports: dark grey rubber or navy NATO, which offer superior grip and water resistance. Alligator creates aesthetic balance with the grey dial, while rubber is ideal if the watch is actually used for diving.

Strap change is performed by removing the two spring bars that pass through the lugs. Using a spring bar tool, apply downward pressure on one end of the spring bar to free it from the case, extract the old strap, and insert the new one. Ensure the new strap is sized for a 20mm lug width. The process takes 2-3 minutes and is reversible without damage.

Yes, as long as the lug width is exactly 20mm. All custom straps made to this measurement are compatible with the 232.90.42.21.03.001. Verify that the strap has been constructed for 20mm lug width, not 18mm or 22mm. Personalized straps from Casati Milano are created specifically for this reference.

A quality leather strap (alligator or vegetable-tanned calf) typically lasts 3-5 years with daily wear, depending on water exposure and maintenance. The titanium case oxidizes slowly over time, creating a patina: a vegetable-tanned strap develops its own patina in parallel, synchronizing aesthetic aging. To extend durability, dry the strap after fresh water contact and occasionally apply leather conditioner.