Strap for Seamaster Planet Ocean 600M Co-Axial 42 Stainless Steel / Black / Alligator

The Seamaster Planet Ocean 2901.50.47 has a lug width of 20 millimetres. This measurement refers to the internal distance between the pins that pass through the case lugs. You can verify it by measuring with a digital calliper between the two internal pins after removing the original bracelet. Minimal manufacturing tolerances (±0.2mm) do not affect compatibility.

It depends on usage. American alligator offers elegance and regular grain, perfect for those wanting to downplay the sporty intensity of the case. Full-grain calf maintains sporting austerity with tactile softness. For frequent aquatic environments, FKM rubber (Tropic) guarantees water and UV resistance. A NATO strap in cordura echoes the military past and is extremely versatile.

The 2901.50.47 uses standard 20mm spring bars. Obtain a spring bar tool, insert the tip into the lateral slot of the lug to compress the internal pin, gently extract the metal bar, and remove the old strap. Insert the new strap onto the bar, reposition the bar in the case lugs until you hear the locking click. Verify that both sides are correctly secured.

Yes, any strap with a 20 millimetre spring bar is compatible. Artisanal brands offer straps made from premium leather (alligator, calf, shell cordovan) or technical materials (rubber, NATO). The important thing is that the bar is correctly sized and that the strap is neither too thick nor too thin relative to the case proportions.

A quality leather strap (alligator, calf, shell cordovan) typically lasts 5–10 years under normal conditions if properly maintained. Factors such as environmental humidity, direct sun exposure, and wearing frequency affect longevity. More robust leathers like shell cordovan tend to last longer thanks to vegetable tanning and fibre density. A rubber Tropic lasts 8–12 years before showing signs of stiffening.