Strap for Portuguese Chrono-Automatic White Gold / 108 Diamond

The Portugieser IW3714-74 features a lug width of 20 millimetres. This measurement refers to the external width of the slot where the strap sits. To ensure compatibility, it is advisable to measure both the width and the usable height of the lug with a digital calliper, as some straps declared as 20mm may have different thicknesses that could prevent smooth insertion.

For a white gold Portugieser, alligator leather represents the pinnacle choice: its fine grain and absence of aggressive texture perfectly complement the cool neutrality of the precious metal. Recommended colours are tobacco brown, deep black, and smoky grey. Alternatively, shell cordovan offers noble ageing and sophisticated patina development, whilst vegetable-tanned calf provides economic accessibility and visible texture.

Strap replacement requires specific tools: a spring bar removal tool or a small screwdriver to extract the spring bars that lock the strap to the lugs. It is essential to apply gentle downward pressure on the tool tip to release the retention mechanism. The watch should be placed on a soft surface (cloth) to prevent scratches. For ease and safety, a specialised atelier such as Casati Milano provides swift strap changes and professional case handling.

Any strap with a 20-millimetre lug width is compatible with the IW3714-74, provided the usable height conforms to lug dimensions. Online, straps in alligator, calf, shell cordovan, NATO, and rubber are available; selection depends on intended use (formal, casual, sport) and personal taste. Milano Straps offers a specialised collection of 20mm straps, customisable in leather, dimensions, and colours.

A quality leather strap (alligator, shell cordovan, vegetable-tanned calf) has an average lifespan of 3–5 years with daily wear. Longevity depends on factors such as frequency of use, water exposure, ambient humidity, and maintenance. Fine leather straps such as alligator can last beyond 5 years if worn sporadically. Casati Milano guarantees 18 months on all custom-made straps, with the possibility of regeneration or replacement of components such as buckles and keeper loops.