Rolex · Sea-Dweller

Strap for Rolex Sea-Dweller 16600 Polizia di Stato

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 Polizia di Stato
FamilySea-Dweller
MovementRolex caliber 3135 Hours, Minutes, Seconds | Chronometer

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 16600 Polizia di Stato

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Sea-Dweller 16600 Polizia di Stato, seen from the bench

The Sea-Dweller reference 16600 Polizia di Stato represents a special version of Rolex's professional dive watch model. It houses the automatic Calibre 3135 with chronometer certification and hour, minute and second functions. The 40mm stainless steel case features 20mm lugs.

Frequently asked questions

What is the lug width of the Rolex Sea-Dweller 16600 Polizia di Stato?

The lug width of the Rolex Sea-Dweller 16600 Polizia di Stato is 20 millimetres. This width allows proper fitting into the case lugs and permits passage of a diving suit's bezel without play or restriction. Measurement should be taken perpendicularly between the centres of the two terminal holes.

What is the best strap for the Rolex Sea-Dweller 16600 Polizia di Stato?

For the Rolex Sea-Dweller 16600 Polizia di Stato, we recommend alligator leather, preferably vegetable-tanned with belly grain. It offers structural rigidity, resistance to salt-water corrosion, and develops a natural patina over time. Alternatively, polyamide NATO strap is the pure tactical solution—waterproof and quickly replaceable. Avoid shell cordovan, which is too formal for a professional tool watch.

How do you change the strap on a Rolex Sea-Dweller 16600 Polizia di Stato?

To change the strap: position the watch with the caseback facing upwards. Using a precision tool (pin pusher or spring bar lever), gently push the pin through the lug, starting from the crown side. Once the pin is extracted, the old strap releases. Insert the new strap into the lugs and reposition the pin from the opposite side, ensuring it is fully seated. If uncertain, consult a professional watchmaker.

Is an aftermarket strap compatible with the Rolex Sea-Dweller 16600 Polizia di Stato?

Yes, provided it respects the 20-millimetre lug width and the correct pin diameter (typically 2.0 mm for this model). Quality aftermarket straps in alligator, calf leather, or rubber fit the original case without issue. Always verify that the pin diameter matches and that the lugs insert securely into the case holes.

How long does a leather strap last on the Rolex Sea-Dweller 16600 Polizia di Stato?

A quality leather strap—alligator with vegetable tanning or vegetable-tanned calf—typically lasts 3-5 years with daily use, particularly if exposed to moisture and perspiration. Alligator, being denser, tends to outlast calf leather. To extend service life, dry the watch after prolonged moisture exposure and occasionally apply specialised mink oil for watches. A NATO strap, thanks to its polyamide construction, can last 10+ years with proper care.

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