Strap for Seamaster Planet Ocean 600M Co-Axial 45.5 Master Chronometer Chronograph Stainless Steel / Green / Rubber

The lug width of the Seamaster Planet Ocean 215.32.46.51.01.004 is 22mm. This dimension is determined by the internal distance between the two lugs and corresponds to the maximum width of a compatible strap. It is essential to verify this measurement before ordering an aftermarket strap to avoid incompatibility.

For a diver of this size and technical heritage, we recommend alligator with soft shoulder (natural leather with balanced grain), vegetable-tanned Tuscan leather in brown or cognac tones, or slate-grey Taurillon calf. The strap must support the weight without rigidity and age gracefully. For frequent use in marine environments, technical NATO strap in Cordura remains the most authentic choice.

The Seamaster Planet Ocean uses straight lugs with a quick-release system via a spring bar. With a dedicated tool (spring bar tool), position the lever under the lug, compress the elastic pin and slide the lug outward. Repeat on the other side. Insert the lugs of the new strap into the housings and verify that the pin clicks into position. The operation takes 2-3 minutes per side.

Yes, the FKM rubber strap is fully compatible and is even an original variant for this model: the Seamaster is born on technical rubber. The lug width remains 22mm. Rubber offers comfort during diving, resistance to chlorine and greater lightness compared to leather, without compromising the aesthetic identity of the timepiece.

A quality alligator or vegetable-tanned calf strap will last 5-7 years of moderate daily use, with the patina improving visually over time. Longevity depends on exposure to humidity, perspiration and frequency of wear. A custom strap from Casati Milano includes an 18-month warranty and can be restored or replaced in case of wear. The quality of vegetable tanning also allows minor repairs (cleaning, finishing touches).