Rolex · Sea-Dweller

Strap for Rolex Sea-Dweller 16600 Comex MK1

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 MK1
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

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Straps for the Sea-Dweller 16600 Comex MK1

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Sea-Dweller 16600 Comex MK1, seen from the bench

The Sea-Dweller reference 16600 was produced from 1988 to 2008 for professional diving applications. It features the automatic Caliber 3135 with chronometer certification and hour, minute, and second functions. The 40mm stainless steel case has 20mm lugs, in the Comex MK1 version destined for the commercial diving company.

Frequently asked questions

What is the lug width of the Rolex Sea-Dweller 16600 COMEX MK1?

The Rolex Sea-Dweller 16600 COMEX MK1 features a lug width (ansa) of 20 millimetres. This measurement represents the distance between the case lugs where the strap attaches. It is essential to verify this measurement before purchasing a compatible strap, as the 16600 COMEX MK1 does not accommodate variations. You can measure the lug width using a digital calliper positioned perpendicular to the attachment pins.

Which strap is most suitable for the Rolex Sea-Dweller 16600 COMEX MK1?

The strap most consistent with the operational character of the 16600 COMEX MK1 is one crafted from alligator or premium calf leather with vegetable tanning. Alligator offers superior grip in humid environments and develops a distinctive patina over time. For those preferring a more classical approach, vegetable-tanned calf leather combines European sartorial heritage with the practicality of leather that gradually adapts to the wrist. Alternatively, vulcanised natural rubber remains a functionally appropriate and historically accurate choice for this model.

How do you change the strap on a Rolex Sea-Dweller 16600 COMEX MK1?

Strap replacement requires a dedicated spring bar tool to remove the attachment pins (spring bars). Procedure: 1) Position the watch on a stable surface; 2) Use the spring bar tool to gently press the pin inward; 3) Extract the pin with precision; 4) Repeat on the opposite side; 5) Thread the new strap onto the pins and reinsert them into their seatings. If you lack confidence in this operation, consult a professional watchmaker to prevent damage to the case or strap.

Is an aftermarket strap compatible with the 16600 COMEX MK1?

Yes, a high-quality aftermarket strap is entirely compatible with the 16600 COMEX MK1, provided it features an exact lug width of 20 millimetres. Artisanal leather straps often offer superior construction quality and aesthetic variety compared to original Rolex straps. Always verify the technical specifications of the strap, particularly the lug width, and source from specialist manufacturers that guarantee dimensional accuracy and material quality.

How long does a leather strap last on a Rolex Sea-Dweller 16600 COMEX MK1?

The lifespan of a leather strap depends on material quality, frequency of use and maintenance. An artisanal strap crafted from alligator or vegetable-tanned calf typically lasts between 3 and 5 years with regular wear. Rubber, conversely, degrades more rapidly when exposed to UV radiation and salt water — usually 2 to 3 years. To extend lifespan, avoid prolonged exposure to extreme humidity and periodically clean the strap with a soft cloth. Investing in a high-quality strap with production defect warranty represents the most conscientious long-term choice.

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