IWC
Portugieser IW3714-18— lug 20mm

The lug width of the Portugieser IW3714-18 is 20 mm. This measurement represents the distance between the spring bars onto which the strap is fitted. It is essential to verify this measurement before purchasing an aftermarket strap to ensure correct fitting to the case lugs.

For a rose gold IW3714-18, Nile alligator (black or dark brown) represents the classic choice par excellence, as the natural square-grain texture creates elegant contrast with the warm metal. Alternatively, vegetable-tanned calfskin in Cognac or Havana tones amplifies the warmth of the gold whilst maintaining formal sobriety. For those preferring versatility, shell cordovan offers durability and a sophisticated patina that develops over time.

The strap is changed by extracting the horizontal spring bars that connect the strap to the case lugs. Use a spring bar tool (small flathead screwdriver with rounded tip) to press the lever and release the bar from the lug. Align the new strap and engage the spring bars into position. This is a straightforward operation that can be completed in minutes, even at home with the correct tools.

Technically yes for the lug width measurement, but not all 20 mm straps guarantee the same aesthetic and functional results. Low-quality straps may present mechanical play on the lugs, compromising the perception of solidity. It is advisable to choose specialised manufacturers that respect precise tolerances and utilise noble materials (alligator, vegetable-tanned calfskin, shell cordovan) consistent with the rose gold case.

The durability of a natural leather strap depends on frequency of wear, tanning type, and care practices. High-quality alligator or calfskin with vegetable tanning typically lasts 3–5 years with daily use. Leather fears prolonged moisture and direct intense sunlight exposure. Periodic cleaning with a damp cloth and application of protective creams extend strap life. Many users maintain multiple straps to rotate according to occasion and climate, significantly extending longevity.