Strap for DS Action Diver Chronograph Automatic Stainless Steel / Black / Rubber

The lug width of the Certina DS Action C032.427.17.051.00 is 20 millimetres. This measurement refers to the distance between the two attachment eyes (lug pins) where the strap is secured to the case. To verify correct measurement, we use a digital calliper positioned perpendicularly to the case, between the two steel eyelets, without excessive pressure.

The best strap depends on intended use. For elegant pairing, we recommend alligator with vegetable tanning in cognac or dark brown tones, which enhances the sporty-classical character. For intensive daily wear, Genova grain calfskin combines comfort and durability. For diving and humid environments, canvas NATO or chloroprene rubber straps are technical and reliable. The critical factor is maintaining the 20mm lug width for perfect compatibility.

Strap replacement is straightforward and requires no specialist skills. Use a spring bar tool to insert the tip into the small lateral opening of the lug pin. With gentle movement, push the internal rod downward: the metal shaft supporting it lowers, allowing strap extraction. Repeat on both sides. For installation of the new strap, align the holes with the pins and push gently until you hear the locking click. If you encounter excessive resistance, do not force: contact Casati Milano for expert assistance.

Any strap with a 20mm lug width is compatible, provided the construction quality and materials align with the technical character of the instrument. We recommend prioritising specialist artisans who use vegetable-tanned leathers (alligator, shell cordovan, calfskin), capable of guaranteeing uniform patina and durability exceeding 5-7 years. On Milano Straps you will find a comprehensive selection of 20mm straps suited to your C032.427.17.051.00.

Durability depends on material and frequency of wear. Alligator or shell cordovan with vegetable tanning can last 7-10 years under normal conditions, developing desirable patina. Coarse-grained calfskin maintains structural integrity for 5-7 years. Military canvas NATO strap easily exceeds 10 years. Prolonged humidity, constant sun exposure and salty perspiration accelerate wear. To extend lifespan, occasionally apply lanolin-based conditioner to leather straps; for NATO, simple rinsing in fresh water suffices.