Rolex · Explorer II

Strap for Explorer II Black Superluminova

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
Reference16570-0004
FamilyExplorer II
MovementRolex caliber 3185 Additional 24 Hour Hand (adjustable), Hours, Minutes, Seconds | Date
CaseStainless Steel

Recommended spring bar

Spring bars Rolex Submariner 16613 — 20mm

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

All Rolex spring barsOpen →

Straps for the Explorer II 16570-0004

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Explorer II 16570-0004, seen from the bench

The Explorer II reference 16570 was developed for explorers and cavers as an evolution of the original model. It features the automatic Rolex Calibre 3185 with independently adjustable GMT hand, hour, minute, second and date indication. The lugs measure 20mm in width.

Frequently asked questions

What is the lug width of the Rolex Explorer II 16570-0004?

The Rolex Explorer II 16570-0004 features a 20mm lug width, a precise specification that distinguishes it from more recent Explorer II models (Ref. 226570) which employ 22mm lugs. This 20mm width requires careful selection of compatible straps and accurate measurement with callipers to ensure perfect fit without tolerance for error.

What is the best strap for the Rolex Explorer II 16570-0004?

The optimal strap depends on intended use. For predominantly formal wear, we recommend natural alligator or vegetable-tanned calf; for field operations, shell cordovan offers superior moisture resistance; for maximum tactical versatility, technical rubber or NATO webbing. Atelier Casati Milano personalises the choice based on your lifestyle during a bespoke consultation by appointment.

How do you change the strap on a Rolex Explorer II 16570-0004?

Strap replacement requires a specialised lug pin removal tool. Position the watch on a soft cloth cushion, locate the small access hole for the pin on each side, insert the tool gently and push to extract the pin. Repeat for the second pin, then slide out the old strap and insert the new one, aligning the pins carefully. This operation demands precision to avoid scratching the case.

Which aftermarket strap is compatible with the 16570-0004?

Any artisanal strap with a precisely 20mm lug width is compatible. Atelier Casati Milano manufactures bespoke straps in alligator, calf, shell cordovan and other materials for this specific width. Always verify that the seller specifies exactly 20mm, as half-millimetre errors render the strap unusable.

How long does a leather strap last on a Rolex Explorer II?

A quality artisanal leather strap, subject to regular maintenance (water-repellent treatment every 6–12 months depending on use), has a lifespan of 5–8 years. Shell cordovan lasts considerably longer due to the leather's intrinsic durability; calf requires greater care in humid environments. Casati Milano's warranty covers 18 months against manufacturing defects, independent of ordinary wear.

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