Certina · DS-2

Strap for DS-2 Chronograph Flyback Stainless Steel / Black / Bracelet

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter43 mm
ReferenceC024.618.11.051.02
FamilyDS-2
MovementETA caliber 251.294 PRD Hours, Minutes, Small Seconds | Date | Chronograph, Flyback
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the DS-2 C024.618.11.051.02

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The DS-2 C024.618.11.051.02, seen from the bench

The Certina DS-2 reference C024.618.11.051.02 features the ETA 251.294 PRD caliber with hour, minute, small second, date and flyback chronograph functions. The movement offers the ability to instantly reset and restart the chronograph function with a single push-button. The watch belongs to the DS (Double Security) collection of the Swiss brand Certina.

Frequently asked questions

What is the lug width of the Certina DS-2 C024.618.11.051.02?

The Certina DS-2 C024.618.11.051.02 features a 20-millimetre lug width. This specification, standard for sports watches with a 43mm case, ensures broad compatibility with certified aftermarket straps. To verify the width, measure the interior of the lug seat: the ruler must run perpendicular from one side to the other, without deviation.

Which strap should I choose for the Certina DS-2 C024.618.11.051.02?

Choice depends on usage and style. For formal elegance, a dark brown alligator or burgundy shell cordovan amplifies the sportive-refined character. For robust daily wear, a grey or blue NATO maintains technical sobriety. Black FKM rubber is ideal if water exposure and physical activity are frequent. We recommend trying at least two materials: one for office-wear, one for adventure-wear.

How do I change the strap on the Certina DS-2 C024.618.11.051.02?

Position the watch on a soft surface with the dial facing downward. Locate the horizontal pins (called tenons) protruding from the case: one per side. Using an appropriate tool—a spring bar tool or thin pick—compress the pin and gently pull the strap out of its seat. Repeat for the other side. Insert the new strap by aligning the internal hole with the pin, press until the click of fastening is heard. Verify stability: the strap must not move forward or backward.

Is there an aftermarket strap compatible with the Certina DS-2 C024.618.11.051.02?

Yes, numerous. All straps with a 20mm lug width are compatible, provided the width of the end tabs matches the case seats. We recommend manufacturers specialising in craftsmanship: vegetable-tanned leather, genuine alligator, cotton-dyed NATO, FKM rubber. Milano Straps offers a curated selection of 20mm options ready for dispatch.

How long does a leather strap last on the Certina DS-2 C024.618.11.051.02?

A quality leather strap (alligator or vegetable-tanned calf) resists 3–5 years with moderate use, 1–2 years with intensive use. Durability depends on ambient humidity, frequency of wear and maintenance. Monthly treatment with conditioning cream (beeswax or leather-specific oil) significantly extends service life. At the end of the cycle, the strap is easily replaced: the pin and case remain intact.

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