Strap for DB25 Perpetual Calendar Rose Gold / Silver

The lug width of the De Bethune DB25 DB25QPARS1 is 20 millimetres. This measurement is model-specific and represents 45.45% of the case diameter (44mm), adhering to the watchmaker's proportional design principles. The lugs feature proprietary De Bethune-patented geometry, non-compliant with ISO 4348 standards, therefore requiring straps specifically engineered for 20mm lug width.

For the DB25QPARS1 in rose gold with Prussian blue dial, alligator leather (Alligator mississippiensis) in cognac brown, dark brown or deep burgundy tones delivers optimal chromatic harmony and ergonomic comfort. Alligator features naturally regular grain texture and superior grip, essential given the case weight (approximately 180g). Viable alternatives include vegetable-tanned calf leather (developing patina over time) and technical NATO in Prussian blue for contemporary pairings.

De Bethune's proprietary lugs demand meticulous care: employ a dedicated strap-changing tool with non-invasive profile geometry. Never force the lugs during extraction, as radial movement could induce micro-abrasions on rose gold flanks. We strongly recommend enlisting a certified watchmaker or Atelier Casati Milano for this operation, ensuring proper lug tolerance (20mm ± 0.2mm) and preserving case structural integrity.

Yes, provided they are manufactured specifically for 20 millimetre lug width with respected tolerances (19.8–20.2mm external lug thickness). Certified quality aftermarket straps from Milano Straps are compatible. Absolutely avoid generic straps or DIY modifications with shims or spacers: De Bethune lugs reject geometric alterations, and misalignment could permanently damage the case.

A premium-grade alligator strap (minimum Grade A/Hermès Standard) subjected to regular use (4–5 times weekly) maintains structural and aesthetic integrity for 5–7 years before exhibiting visible edge wear and material thinning. Lifespan extends to 10+ years with occasional use (1–2 times monthly). Prolonged exposure to direct sunlight and moisture accelerates ageing. Vegetable-tanned leather develops patina but does not degrade faster; NATO and rubber exhibit superior longevity (10–15 years) but less aesthetic versatility.