Certina · DS First

Strap for DS First Lady Ceramic Chrono White Bracelet

Takes 17 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width17 mm
Case diameter35 mm
Referencec0142171101101
FamilyDS First
MovementETA caliber 251.471 hours, small seconds, minutes | date | Chronograph
CaseCeramic, Stainless Steel

Spring bar

Swiss Standard universal spring bars

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

The DS First c0142171101101, seen from the bench

The Certina DS First reference C0142171101101 is powered by the ETA 251.471 caliber featuring hours, minutes, small seconds, date and chronograph functions. The watch features 17mm lugs and belongs to the Swiss brand's DS First collection. The movement offers chronograph complications integrated into the case design.

Frequently asked questions

What is the exact lug width of the Certina DS First c0142171101101?

The lug width of the Certina DS First c0142171101101 is 17 mm, a non-standardised commercial dimension requiring specific straps. To verify compatibility, measure with a digital caliper the distance between the inner edges of the lug, perpendicular to the pass-through hole. Certina's manufacturing tolerance is ±0.2 mm.

Which strap is most suitable for the Certina DS First c0142171101101?

Black alligator or regenerated black calf leather represent the supreme formal choices, owing to aesthetic coherence with the ceramic insert on the bezel. For daily wear, a NATO in Cordura canvas or FKM Viton rubber offers versatility and durability. The lug always requires reinforced fabric to absorb humidity variations.

How do I change the strap on the Certina DS First c0142171101101?

The c0142171101101 is fitted with a standard spring bar. To remove the strap, insert a spring bar removal pin into the lateral orifice of the lug, press gently inward to release spring tension, then extract the strap. Ensure that the ends of the new strap are rectified and chip-free before assembly.

Is there an aftermarket strap compatible with the Certina DS First c0142171101101?

Yes, any strap with a 17 mm lug width is compatible with the c0142171101101, provided it features a standard spring bar attachment. Milano Straps offers a curated range of 17 mm straps in alligator, calf, NATO, and rubber, all ready for shipment and customisable according to your colour preferences.

How long does a leather strap last on a watch like the Certina DS First c0142171101101?

A quality alligator or calf strap, subjected to ordinary use (not exposed to water or excessive perspiration), retains its elastic properties for 5-7 years. Vegetable tanning develops a progressive and desirable patina. Longevity increases if the strap is stored away from direct sunlight and subjected to periodic cleaning with neutral soap and mink oil.

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