Strap for Seamaster Planet Ocean 600M Co-Axial 43.5 GMT Titanium / Blue / Bracelet

The Seamaster Planet Ocean 232.90.44.22.03.001 is fitted with lugs measuring exactly 21mm, measured between the internal attachment pins of the case. This is a rare and specific dimension for this model, essential for selecting a compatible strap without forced adjustments.

For this 43.5mm titanium case we recommend vegetable-tanned alligator leather (brown-burgundy tones) for maximum aesthetic versatility, or moisture-resistant calf leather for intense marine environments. For pure sports use, a grey NATO strap or FKM rubber ensure absolute saltwater resistance.

The strap is replaced by removing the attachment pins (lugs) from the case using a dedicated tool or small screwdriver. The pins are approximately 15-18mm long and slide vertically. Insert the new strap by aligning the holes with the lugs, then reinsert the pins until you feel them lock into place.

Yes, absolutely. The 21mm lug width is standardized: any artisanal strap with 21mm lugs fits perfectly. Always verify the internal lug measurement of the strap you purchase to avoid play or forced fitting.

A quality alligator or calf leather strap with certified vegetable tanning lasts 3-5 years under moderate use conditions, up to 2-3 years if frequently exposed to saltwater, direct sunlight and marine humidity. The patina develops naturally within the first year. Casati Milano guarantees 18 months on all personalized artisanal straps.