Rolex · Sea-Dweller

Strap for Rolex Sea-Dweller 16600 Comex MK2

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter40 mm
Reference16600 Comex MK2
FamilySea-Dweller
MovementRolex caliber 3135 Hours, Minutes, Seconds | Chronometer

Recommended spring bar

Spring bars Rolex Sea-Dweller 16600 — 20mm blind lugs

Technical match for lug width and diameter · lug 20 mm · Ø 1.5 mm · closed lugs

All Rolex spring barsOpen →

Straps for the Sea-Dweller 16600 Comex MK2

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Sea-Dweller 16600 Comex MK2, seen from the bench

The Sea-Dweller reference 16600 Comex MK2 represents a special version of Rolex's professional dive watch model, destined for the French oil company. It mounts the automatic Calibre 3135 with chronometer certification and hour, minute and second indication. The 40mm stainless steel case features 20mm lugs.

Frequently asked questions

What is the exact lug width of the Rolex Sea-Dweller 16600 Comex MK2?

The lug width of the Rolex Sea-Dweller 16600 Comex MK2 is 20 millimetres. This dimension is calibrated for the visual balance of the 40 mm case and ensures compatibility with standard spring bars. To measure accurately, use a digital calliper between the two metal lugs at either 12 o'clock or 6 o'clock position.

What is the best leather strap for the Rolex Sea-Dweller 16600 Comex MK2?

Vegetable-tanned alligator is the most versatile choice, with fine texture and natural grain that contrasts elegantly with the steel. For collectors seeking character, shell cordovan develops a profound patina over time. Vegetable-tanned bull leather offers balance between aesthetics and longevity, whilst rubber remains the most authentic choice for preserving the model's diving heritage.

How do you change the strap on a Rolex Sea-Dweller 16600 Comex MK2?

The Sea-Dweller 16600 Comex MK2 is fitted with standard spring bars on both sides of the case. Using a proper spring bar tool, position yourself at 12 o'clock and 6 o'clock, gently extract both spring bars, remove the old strap and insert the new one. Ensure the spring bars click fully into their seats before wearing the watch.

Are aftermarket straps compatible with the 20mm lug width available?

Yes, any strap with a 20mm lug width is compatible with the Rolex Sea-Dweller 16600 Comex MK2. Always verify that spring bars are in perfect condition and that the strap features solid construction, as the Sea-Dweller is a professional instrument deserving components of equivalent quality. Specialist artisan brands guarantee longevity and reliability.

How long does a leather strap last on the Rolex Sea-Dweller 16600 Comex MK2?

Durability depends on the tanning method and frequency of use. Vegetable-tanned alligator or bull leather has an average lifespan of 3–5 years under normal conditions; shell cordovan can exceed 10 years thanks to the natural density of the leather. Frequent exposure to salt water shortens this timeframe, whilst proper maintenance (periodic cleaning, drying) extends longevity. Artisan-quality straps with production defect warranties offer maximum peace of mind.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only