Strap for Seamaster Planet Ocean 600M Co-Axial 39.5 Master Chronometer Stainless Steel / Black / Bracelet

The lug width of the Seamaster Planet Ocean 215.30.40.20.01.001 is 19 mm. This width is measured between the lateral attachment pins of the case and is essential for selecting a compatible strap. Precise measurement prevents mechanical incompatibility.

For this model we recommend alligator straps with vegetable tanning for elegant occasions, high-density calf for daily sportive versions, or fluoroelastomeric rubber (FKM) if total water resistance is the priority. The choice depends on intended use and colour harmony with the ocean blue dial.

Strap replacement requires a spring bar tool to remove the attachment pins from both sides of the case. Insert the tool into the lateral spaces of the lugs to compress the spring, extract the pin, replace the strap, and reinsert the pin until the locking click. Avoid sudden movements to preserve the case finishing.

Yes, provided the strap is sized for 19 mm lug width and the attachment pins have the same diameter. Custom artisanal straps from milanostraps.it are fully compatible and offer the possibility to choose materials, finishes and thicknesses to achieve unique configurations.

A quality leather strap, properly maintained, lasts from three to five years under moderate daily use conditions. Durability varies depending on the material (shell cordovan resists longer than standard calf), salt and humidity exposure, and cleaning frequency. Artisanal milanostraps.it straps benefit from an 18-month warranty at Casati Milano.