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

The lug width of the Seamaster Planet Ocean 215.15.40.20.01.001 is 19 millimetres. This measurement corresponds to the inner distance between the two horizontal pins (spring bars) that hold the strap on the case. You can easily verify it with a calliper or request confirmation from a trusted watchmaker.

It depends on usage and aesthetic preferences. An alligator or shell cordovan with vegetable tanning develops a golden patina over time that enhances the blue dial. English calf carapace offers structure and subtle texture. For frequent underwater use, perforated FKM rubber guarantees elasticity even in cold water and requires no patina maintenance. Each material interacts differently with the brushed case.

The Seamaster Planet Ocean 215.15.40.20.01.001 uses standard spring bars that can be inserted from the ends. Position the watch with the lug facing upward, use a specific tool (lever pusher or small flat screwdriver) to gently depress the pin on one side and slide it out. Repeat on the other side. Insert the new pins into the new strap, then reinsert everything into the case. If you lack experience, consult a watchmaker.

Yes, provided they have a 19 mm lug width and the tubulars are correctly sized for the case width. Milanostraps offers bespoke leather, rubber and fabric straps specifically compatible with this measurement. Always verify that the strap keeper is proportioned to the case geometry for harmonious aesthetics.

A quality artisanal leather strap, with vegetable tanning and hand-stitched construction, typically lasts 3-5 years with frequent wear, developing a visibly deeper patina in the first 18 months. Durability depends on exposure to water, humidity and frequency of wear. Milanostraps offers an 18-month warranty and bespoke strap creation at the Casati Milano atelier, including specific maintenance advice to maximise longevity.