IWC
Da Vinci IW3758-19— lug 20mm

The lug width (misura ansa) of the IWC Da Vinci IW3758-19 is precisely 20 mm. This measurement is critical for strap compatibility and must be verified accurately. To confirm, remove the original strap and measure the internal distance between the lugs using a digital calliper, from the centre of one lug to the centre of the opposite lug.

For the IWC Da Vinci IW3758-19 in 18-carat yellow gold, we recommend dark brown alligator or cognac-toned calf leather. Alligator offers regular grain texture and a noble patina that evolves over time, perfectly complementing the perpetual calendar's technical sophistication. Calf leather provides tactile softness and controlled grain imperfection that balances the timepiece's engineering excellence. Both materials naturally harmonise with the gold's chromatic warmth.

To replace the strap, carefully remove the spring bars using a dedicated spring bar tool or precision screwdriver. Work with delicacy to avoid scratching the case, particularly at the lug areas where the case is most vulnerable. Ensure the new strap has an exact lug width of 20 mm. If you lack experience, entrust this task to a qualified watchmaker or Atelier Casati Milano, available by appointment.

Yes, all artisanal straps with a 20 mm lug width are compatible with the IW3758-19. At milanostraps.it you will find a curated collection of straps in this size, crafted from noble leathers including alligator, calf, shell cordovan and other rarities. Each strap can be personalised in fit, length, stitching thread colour and, upon request, with embroidered initials.

A high-quality leather strap (alligator, calf, shell cordovan) typically lasts 3–5 years with daily wear, extending to 8–10 years with moderate use. Longevity depends on wear frequency, ambient humidity, perspiration exposure and maintenance habits. Regular upkeep—including cleaning, drying after moisture exposure and annual conditioning with specialist creams—significantly extends the strap's lifespan.