Strap for Submariner Date Yellow Gold / Blue-Diamond

The lug width of the Rolex Submariner 116618lb-0002 is 20 millimetres. This is the distance between the horizontal lugs of the case where the strap is anchored. It is a precise measurement: a strap of 19 or 21 millimetres will not fit correctly. To verify it, remove the current strap and measure with a digital calliper the distance between the centre of one lug and the centre of the other.

For a Submariner in white gold with blue dial, the best material is alligator with vegetable tanning. The natural grain of alligator leather creates a fascinating aesthetic contrast with white gold and the dark blue dial, adding depth and movement in the light. An alternative of absolute value is shell cordovan, horse leather that maintains natural rigidity and develops an ennobling patina. If you intend to wear the watch in water, black rubber remains the authentic choice.

To change the strap on the Submariner, you need two tools: a spring bar tool and a small amount of patience. Position the watch with the dial facing down, insert the tip of the tool into the small lateral hole of the lug, apply slight pressure towards the centre of the case until the lug gives way, extract the lug and free the strap. Repeat for the other lug. When fitting the new strap, insert the lug first on one side, then guide the other end through the strap and insert the second lug, verifying that it clicks into place correctly. This operation, if performed with a steady hand and without haste, requires less than five minutes.

Yes, any strap with a lug width of 20 millimetres is physically compatible with the Submariner 116618lb-0002. However, technical compatibility does not necessarily coincide with aesthetic or qualitative compatibility. An artisanal strap made by a specialised atelier, such as Casati Milano, respects the quality standards expected from a Rolex in white gold: the thickness of the leather, the rigidity, the texture, the finishing of the seams must dialogue with the case and dial. A mass-market strap, even if of correct size, might appear undersized or poor quality compared to the value of the watch. For the Submariner 116618lb-0002, a customised strap or one from a well-established brand is recommended.

The lifespan of a leather strap depends on the material, frequency of use and environmental conditions. A quality artisanal alligator or shell cordovan, worn daily, lasts 4-6 years before showing signs of wear at the seams or slight cracking at the edges. If worn less frequently or only in dry conditions, the lifespan extends to 8-10 years. Exposure to constant humidity, tropical climates or salty environments (sea air) reduces the lifespan to 2-3 years. Vegetable tanning, while noble and developing an ennobling patina, is intrinsically less resistant than chrome tanning. An artisanal strap from Casati Milano includes an 18-month guarantee on manufacturing defects, covering the critical settling phase of the leather. After this period, wear is natural and part of the charm of living leather.