Strap for Sea-Dweller Deepsea Yellow Gold / Blue

The lug width (ansa measurement) of the Sea-Dweller 136668lb-0001 is precisely 21 millimetres. This dimension is specific to this model and differs from previous Sea-Dweller iterations. To measure correctly, use a digital calliper positioned perpendicularly to the case, measuring from the internal point of one lug to the internal point of the other, excluding the spring bar attachment posts. Any strap must respect this width with precision.

For this hybrid titanium-yellow gold case, we recommend alligator leather tanned with vegetable methods in dark brown (cognac, chocolate) or absolute black. The robustness of alligator supports the weight of the case (approximately 145 grams) and the leather density guarantees durability in marine environments. A yellow gold 18-carat or titanium deployante buckle completes the construction aesthetic. Contemporary alternative: FKM rubber with diamond pattern for dedicated diving use.

Strap replacement requires removal of the spring bar from the case lugs. Use a dedicated spring bar tool to apply controlled pressure on the spring bar tab, creating the necessary space to extract the pin. Remove the spring bar completely, disconnect the old strap, and insert the new one by aligning the spring bar holes with the strap slots. Reinsert the spring bar with fluid movement until it clicks into position. Verify that the strap is firmly secured before wearing the watch.

Yes, provided the strap strictly respects the 21-millimetre lug width and is constructed from robust materials (alligator, calf leather, FKM rubber). Bespoke artisanal straps are the optimal solution: they allow precise selection of material, colour, buckle type and texture. Avoid universal or generic straps that may not adhere correctly to the specialised lugs of this model. Compatibility depends on construction quality and precision in lug width measurement.

Leather strap longevity depends on frequency of use, material type and maintenance. Well-crafted vegetable-tanned alligator typically lasts 3–5 years with regular daily wear. Constant exposure to salt water and UV rays may reduce this lifespan. Materials such as Japanese shell cordovan offer greater longevity (5–7 years) due to natural fibre density. FKM rubber is more durable (7–10 years) but loses elasticity over time. Regular maintenance—cleaning with a damp cloth, complete drying, occasional conditioning with specialist balms—significantly extends strap life.