Certina · DS Spel

Strap for DS Spel Chronograph Silver

Takes 15 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width15 mm
Case diameter41 mm
ReferenceC0124171103700
FamilyDS Spel
MovementETA caliber 251.262 hours, minutes, small seconds | date | Chronograph
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

The DS Spel C0124171103700, seen from the bench

The Certina DS Spel Chronograph Silver C0124171103700 is a 41mm stainless steel sports watch launched in the 1960s for professional diving. It features a distinctive tonneau case with patented internal bezel and ETA caliber 251.262 column chronograph movement offering hours, minutes, small seconds, and date. The 15mm lug width and sealed case architecture with mineral crystal ensure durability and water resistance for extended immersion. A technically engineered instrument designed for professionals without compromise.

Frequently asked questions

What is the lug width of the Certina DS Spel C0124171103700?

The lug width of the Certina DS Spel C0124171103700 is 15mm. This measurement is specific to this model and is determined by the tonneau case engineering. To verify it, measure the internal distance between the two lugs using a digital calliper or a ruler positioned perpendicular to the case.

Which strap is best suited for the Certina DS Spel C0124171103700?

The ideal strap depends on intended use. For formal and classic contexts, we recommend vegetable-tanned alligator in cognac or tobacco tones; for sports and water use, a robust technical NATO; for daily versatility, soft brushed calf; for frequent diving, a fluoroelastomer rubber with deployante buckle.

How do I change the strap on my Certina DS Spel C0124171103700?

To change the strap, place the watch on a soft surface. Use a spring bar removal tool to gently loosen the internal spring of the lug, leveraging from the opposite side. Remove the old strap, insert the new one aligning it to the lugs, and reposition the spring. Verify that the strap is secure before wearing the watch.

Can I use an aftermarket 15mm strap on my C0124171103700?

Yes, any strap with a 15mm lug width is compatible with the Certina DS Spel C0124171103700. We recommend choosing handcrafted straps with lugs made from synthetic fibre or steel, specifically engineered for this width, to ensure optimal fit and maximum longevity.

How long does a leather strap last on the Certina DS Spel C0124171103700?

The lifespan of a leather strap depends on construction quality and material. A vegetable-tanned alligator strap, properly maintained (avoiding prolonged moisture and direct UV rays), lasts 3-5 years of daily use. High-quality calf leather can last 4-7 years. To extend strap life, periodically apply a protective balm and allow the leather to dry completely after water exposure.

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