Strap for Da Vinci Perpetual Red Gold / Black / 120 Years

The lug width of the IWC Da Vinci IW3750-05 is 19mm. This measurement represents the internal distance between the two attachment points on the case where the strap is fitted. It is an IWC construction standard for chronographs in this dimensional category (39mm), chosen to ensure harmonic proportionality and correct strap drop on the wrist.

The ideal strap for the IW3750-05 is alligator tinted in warm hues (cognac, chocolate, mahogany) or vegetable-tanned calf leather. Both dialogue naturally with the rose gold case without aesthetic competition. For a versatile approach, a NATO strap in thick canvas—charcoal grey or navy blue—offers balanced contrast whilst maintaining the watch's characteristic elegance.

To change the strap, obtain a spring bar tool and proceed as follows: rest the watch on a soft surface, insert the tool's tip into the hole of one lug pin, push downward to compress the internal spring, and slide the pin from its seat. Repeat for the second pin. Align the new strap on one side first, then compress the pin on the opposite side to secure it. Ensure both pins are firmly locked in position.

No, a high-quality aftermarket strap maintains and can enhance the perceived value of the watch. Specialist brands like MilanoStraps, working with premium leathers (alligator, shell cordovan) and artisanal finishing, elevate the overall presentation. The recommendation is to retain the original IWC strap (if available) for potential future transactions, but for daily wear, a bespoke strap in noble leather is a legitimate aesthetic and comfort upgrade.

Strap longevity depends on tanning type and usage patterns. An alligator or vegetable-tanned calf strap typically lasts 5–7 years with moderate daily wear, thanks to leather fibre density and wear resistance. More delicate leathers may require replacement after 3–4 years. Proper maintenance—avoiding prolonged moisture and heat exposure, rotating between straps, applying natural balms every six months—significantly extends service life.