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Rolex · Sea-Dweller

Strap for Rolex Sea-Dweller 16660 Matte MK2

The Rolex Sea-Dweller 16660 Matte MK2 takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

20mm
20 mm strapsAll Rolex
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Lug width20 mm
Case diameter40 mm
Reference16660 Matte MK2
FamilySea-Dweller
MovementRolex caliber 3035 Hours, Minutes, Seconds | Date | Chronometer
Spring barØ 2 mm

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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All Rolex spring barsOpen →
Rolex Sea-Dweller 16660 Matte MK2 — watch

Straps for the Sea-Dweller 16660 Matte MK2

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

What I'm asked about the Rolex Sea-Dweller 16660 Matte MK2

What strap size does the Rolex Sea-Dweller 16660 Matte MK2 take?

The Rolex Sea-Dweller 16660 Matte MK2 needs 20 mm between the lugs, usually 16 mm at the buckle. It's the size I've been fitting on it for years.

Can the strap on the Rolex Sea-Dweller 16660 Matte MK2 be changed?

Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.

Can I put a leather strap on the Rolex Sea-Dweller 16660 Matte MK2?

Yes, in 20 mm leather, as long as you don't wear it in the water: leather doesn't like the sea or the pool. For days in the water, rubber. On a 40 mm diver I go for a full-thickness strap, not a thin one.

Which strap do you recommend for the Rolex Sea-Dweller 16660 Matte MK2?

Rubber if you wear it in the water; otherwise a 20 mm calf strap, full thickness. You'll find it ready in the 20 mm collection. If you'd rather have something built on your wrist, the Casati atelier.

More Rolex in 20 mm

For changing the strap

Classic Strap and Bracelet Removal Tooltwo-tip spring bar tool→Milano Straps Premium Swiss Standard Watch Bucklestang buckle, steel or PVD→Leather Conditioner Milano Strapsnourishes and protects the strap→Casati Milano Rectangular Epsom Leather Travel Case — Brownfor the watch and spare straps→

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.

Request an appointment →

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

Bespoke straps for Rolex, in the atelier or by video call: casatimilano.com