Strap for DS-1 Big Date Powermatic 80 Rose Gold / Blue

The lug width (ansa width) of the Certina DS-1 C029.426.36.041.00 is 20mm. This measurement is the distance between the two lugs on the case and determines compatibility with any aftermarket strap. Always verify by measuring directly with a digital calliper, positioned perpendicular to the lugs, to exclude errors from tapered or bevelled lugs.

The Certina DS-1 pairs effectively with leather straps featuring vegetable tanning (dark brown, burgundy, black) for formal-elegant contexts, or NATO straps in cotton or silk for sport-casual wear. Vulcanised rubber with fine grain texture ensures practicality and water resistance whilst preserving the visual balance of the 41mm case. Avoid excessive perforation: the DS-1 is a daily instrument, not a diving watch.

Remove the original strap by disengaging the spring bars (elastic springs) located inside the case lugs, using a dedicated flat lever tool. Insert the new strap by threading the lugs directly into the slots at the strap ends, re-securing the spring bars. If the spring bars are stiff, do not force: professional assistance from Atelier Casati Milano is recommended, where experienced technicians guarantee strap changes without risk of damage to the lugs.

Yes, 20mm is one of the most common lug widths in the watch market. Numerous artisanal solutions are available: full-grain leather (alligator, calf, shell cordovan), NATO ribbons in natural fibres, vulcanised rubber. Ensure that the strap is designed with consistent thickness (1.4–1.6mm at the tip) for harmonious fit. MilanoStraps offers a complete collection of 20mm-compatible straps, ready for dispatch and customisable according to aesthetic and functional preferences.

A high-quality leather strap (alligator, shell cordovan, vegetable-tanned calf) worn daily lasts an average of 3–5 years before replacement is required. Longevity depends on usage (climate, washing frequency, personal perspiration), tanning quality and maintenance care (periodic cleaning, keeping away from moisture). Perforated leather straps have a shorter lifecycle (18–30 months) due to concentrated stress at the perforation points. Ageing is not a defect: the natural patina of vegetable tanning synchronises the strap with the watch over time.