Strap for DS-1 Powermatic 80 40 PVD / Black / Mesh

The lug width of the Certina DS-1 C029.807.33.051.00 is 20mm. This measurement is taken between the two metal spring bars located at 12 and 6 o'clock on the case, measuring internally from shoulder to shoulder. A strap compatible with 20mm lugs ensures precise fit and secure closure.

The choice depends on intended use: for maximum aesthetic rigour, an alligator strap with vegetable tanning amplifies the minimalist geometry of the case; for robust daily wear, a technical NATO or vulcanised rubber strap respects the tool-watch ethos of the original design. Smooth calf or fine-grained leather offers versatile alternatives.

The strap is replaced using a spring bar removal tool. Position the bifurcated tip around the metal spring bar at one end of the case, apply gentle pressure to release the internal catch, and extract the bar. Repeat at the other end, then insert the new strap by reinserting the bars into the case lugs.

Any strap with 20mm lug width is compatible: leather, alligator, shell cordovan, rubber, NATO. At milanostraps.it you'll find a curated selection of artisanal 20mm straps, fully customisable and ready to ship.

A natural leather strap with vegetable tanning lasts 3–5 years with daily wear, depending on moisture and sunlight exposure. Leather oxidises naturally, developing patina: this aesthetic aging is characteristic, not deterioration. Regular cleaning and protection from prolonged water exposure extends functional life.