Strap for Rolex Sea-Dweller 116600

The Rolex Sea-Dweller 116600 features a 20mm lug width (ansa). This dimension is specific to the Sea-Dweller lineage and incompatible with subsequent 40mm Rolex sports models (which mount 21mm from 2020 onwards). Correct measurement is taken from the inner point of the upper lug to the inner point of the lower lug, excluding lug thickness. Precision of 0.5mm is critical to prevent friction on the case during daily wear.

There is no universal choice, but rather three logical categories. Alligator is the most versatile solution: elastic, develops a fascinating patina over time, but requires drainage after saltwater use. Shell cordovan offers superior elegance and natural water-resistance, ideal for those who refuse frequent maintenance and desire refined aesthetics. Rubber or NATO fabric ensure maximum durability in fully aquatic environments and clean with fresh water rinse. Selection depends on primary usage context: formal, daily, or operational.

The procedure requires a dedicated spring bar tool to compress the internal springs that support the lugs. Locate the access point (micro-hole on the lower lug), insert the tool with precision and push upward to release the spring. Extract the spring carefully — complete disassembly is unnecessary if you possess experience. For inexperienced users, Casati Milano offers personalised installation with leather consultation and 18-month guarantee on craftsmanship.

Yes, provided the lug width is precisely 20mm. A compatible strap does not compromise the watch's timekeeping function or water-resistance of the case. However, we recommend verifying with the manufacturer that the strap has undergone durability testing in salt-water environments (if intended for aquatic use). Casati Milano offers 20mm straps specifically engineered for Sea-Dweller use, featuring artisanal finishes and conformity guarantee.

Durability depends on tanning method and maintenance protocol. An alligator strap in chrome tanning (commercial standard) typically lasts 3–5 years with frequent immersions, as salt and chlorine progressively attack collagen fibres. A shell cordovan or vegetable-tanned strap requires drying within 2 hours of saltwater use to preserve structural integrity — neglecting this procedure drastically reduces lifespan. For intensive marine use (professional divers), rubber or NATO fabric are mandatory choices. Casati Milano provides straps with 18-month guarantee on manufacturing defects, regardless of tanning and material.