Strap for Seamaster Planet Ocean 600M Co-Axial 45.5 Master Chronometer GMT Deep Blue Sapphire

The Omega Seamaster Planet Ocean 215.98.46.22.03.001 features a 22 millimetre lug width. This measurement is determined by the internal space between the pins of the curved lugs on the ceramic and platinum case. To verify the compatibility of an aftermarket strap, always measure the distance between the pins from inside to inside: it must be exactly 22mm.

The most coherent straps are polished black alligator (Hermès-style) for formal elegance, vegetable-tanned calf in burgundy or brown for aged patina, or Japanese shell cordovan in whiskey tones for near-metallic density. For daily use and underwater wear, a black FKM rubber strap with satin texture offers maximum versatility without compromising salt-water resistance.

Ensure the watch is stopped (seconds at zero for safety). Use a spring bar tool, inserting the flat lever into the small holes at the sides of the lugs. Press inward to compress the pin springs, then pull the old strap outward. Insert the new 22mm strap by aligning it correctly and allow the pins to snap into position. Verify that there are no gaps or abnormal tensions.

Any strap with a 22mm lug width is compatible. Online you will find catalogues for generic Omega Seamaster straps: always verify the specifications. Milano Straps offers a collection dedicated to 22mm sizes customizable in leather, colour and stitching thread. For bespoke requirements, the Casati Milano atelier creates made-to-order straps with direct selection of tanneries and photographic updates during crafting.

A fine leather strap (alligator, calf, shell cordovan) typically lasts 2-4 years with daily use, provided it is not occasionally exposed to prolonged immersion. Fresh water is well tolerated; salt water (with chlorine) reduces lifespan. We recommend rotating with rubber straps during humid seasons or diving activities. A quality leather strap develops patina over time: this is not deterioration but acquired character. Milano Straps offers an 18-month warranty on every bespoke strap made by Casati Milano.