Rolex · Sea-Dweller

Strap for Rolex Sea-Dweller 16660 Tiffany

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
Reference16660 Tiffany
FamilySea-Dweller
MovementRolex caliber 3035 hours, minutes, seconds | date | chronometer
CaseStainless Steel
CrystalSapphire
Water resistance1220

Recommended spring bar

Spring bars Rolex Sea-Dweller 1665 — 20mm Double Red

Technical match for lug width and diameter · lug 20 mm · Ø 2 mm · drilled lugs

All Rolex spring barsOpen →

Straps for the Sea-Dweller 16660 Tiffany

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Sea-Dweller 16660 Tiffany, seen from the bench

The Sea-Dweller reference 16660 was introduced in the 1980s as a professional dive watch. It is equipped with the automatic Rolex caliber 3035, certified chronometer, indicating hours, minutes, seconds and date. Stainless steel case 40mm with 20mm lugs.

Frequently asked questions

What is the lug width of the Rolex Sea-Dweller 16660 Tiffany?

The Rolex Sea-Dweller 16660 Tiffany features a lug width of 20mm. This is the distance between the two attachment points (spring bars) at the case extremities. Accurate measurement is essential before ordering a strap, as an incorrectly sized strap will not fit the attachments and may cause irreparable damage.

Which strap is recommended for the Rolex Sea-Dweller 16660 Tiffany?

The ideal strap depends on usage and aesthetic preferences. For formal-sporty wear, we recommend natural alligator with vegetable tanning in mid-brown or cognac tones, or shell cordovan which develops character patina over time. For daily use with high moisture resistance, rubber or canvas NATO straps are rational choices. Smooth calf leather in dark tones offers the best compromise between elegance and practicality.

How do I change the strap on a Rolex Sea-Dweller 16660 Tiffany?

Insert a spring bar tool into the slot of the spring bar and gently push it towards the opposite side of the case until the internal spring compresses. Once compressed, the pin releases from the attachment. Remove the old strap. For the new one, position the pin of the attachment in the slot of the spring bar on the new strap, insert the pin into the case attachment and slowly release the tool. Repeat on the other side. Always use gentle movements to avoid scratching the case.

Can I use an aftermarket strap on the Rolex Sea-Dweller 16660 Tiffany?

Yes, absolutely. A quality artisanal 20mm aftermarket strap made with materials such as alligator, shell cordovan or vegetable-tanned calf is fully compatible with the 16660 Tiffany. Compatibility is guaranteed by the 20mm lug width. What matters is choosing a high-quality strap that respects the historical and technical importance of the watch.

How long does a natural leather strap last on the Rolex Sea-Dweller 16660 Tiffany?

Longevity depends on the material, tanning method and usage. An alligator or vegetable-tanned calf strap typically lasts 2-4 years with regular use, developing characteristic patina over time. Shell cordovan, being more durable, can last 4-6 years. Wear accelerates if frequently exposed to fresh or salt water, prolonged humidity and intense sunlight. Periodic maintenance (gentle cleaning, balm application) significantly extends strap life.

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