Strap for Ode à la Semaine / Monday

The lug width of the WCF20TJMOWG01AA is 20 millimetres. This measurement is calibrated based on the proportions of the 43mm case and the integrated lugs—a deliberate constructive choice that requires specific straps. Measurement should be taken with a digital calliper between the inner spaces of the lugs themselves.

For the WCF20TJMOWG01AA, alligator represents the most natural choice due to its contained grain and regular texture that dialogues perfectly with the white gold case. Alternatively, vegetable-tanned calf offers organic ageing over time. For intensive daily use, modern rubber (fluoroelastomer) guarantees maximum durability, whilst a NATO in heavy cordura allows rapid changes without horological intervention.

Changing the strap on watches with integrated lugs requires precision. Use a spring bar tool to gently remove the spring bar that holds the strap to the lugs. The integrated lugs leave reduced spaces, so the new strap must be positioned with exactitude to avoid excessive pressure. For optimal results, contact a professional watchmaker or Atelier Casati Milano for a bespoke fitting service.

Yes, artisanal-quality aftermarket straps in 20mm are available. The most reliable suppliers offer noble materials such as Grade A alligator, vegetable-tanned calf, and fluoroelastomeric rubber. It is essential to verify that the strap has been crafted with care, particularly in the curvature of the integrated lug, as any mounting imperfections become immediately visible on a watch of this aesthetic calibre.

The lifespan of a leather strap depends on intensity of use, climatic conditions, and tannery quality. A superior-grade alligator with vegetable tanning can last 5–7 years of moderate daily use before replacement is required. Vegetable-tanned calf tends to show ageing sooner, typically 3–5 years. Frequent exposure to water, perspiration, or extreme temperatures significantly reduces durability. Preventative maintenance (cleaning, conditioning, drying) extends the strap's life.