Strap for Seamaster Planet Ocean 600M Co-Axial 45.5 Chronograph Stainless Steel / Black / Bracelet

The lug width is 20mm. This width is specific to the 45.50mm Seamaster Planet Ocean and is designed to ensure visual balance and wrist comfort. To verify the correct measurement, position a caliper on the inner shoulders of the lugs (where the straps anchor to the case) and measure the distance between the attachment pins.

It depends on your intended use and desired aesthetics. For a classic approach, we recommend vegetable-tanned alligator (dark brown or black), which contrasts harmoniously with the orange LiquidMetal™ bezel. For frequent nautical contexts, modern rubber offers durability and practicality. Shell cordovan is ideal if you seek leather that develops patina over time. NATO straps remain reversible and versatile.

The change is a straightforward operation requiring a specific tool (spring bar tool). Position the watch face-down on a soft surface, insert the tool into the side slot of the attachment pin, press lightly to release the internal spring, and slide off the old strap. Insert the new strap by first aligning one lug, then press and secure the pin. If you are unsure, consult a specialized watchmaker.

Yes, provided they respect the 20mm lug width. Milano Straps offers certified straps for this size, crafted in artisanal leather (alligator, calf, shell cordovan) and technical rubber. All our 20mm straps are pre-cut according to Seamaster Planet Ocean specifications and come with spare pins.

A quality artisanal leather strap, if subjected to reasonable use (worn 3-5 days weekly), typically lasts 3-5 years before requiring replacement. Vegetable-tanned alligator and shell cordovan age better, developing patina and maintaining structure. Frequent exposure to water, sweat, and UV rays shortens lifespan. Milano Straps offers an 18-month warranty on all custom straps.