Strap for Portugieser Chronograph Stainless Steel / Burgundy

The lug width of the IWC Portugieser IW3716-16 is precisely 20mm. This measurement represents the perpendicular distance between the two lugs where the strap is attached to the case. It is essential to measure this dimension accurately using a digital calliper positioned on the inner shoulder of the lugs, with an acceptable tolerance of ±0.5mm.

Alligator leather of superior quality is the ideal material for the Portugieser IW3716-16, respecting the functional purity of the timepiece whilst developing natural patina over time. Alternatively, shell cordovan offers a more compact surface and lacquer-like lustre, whilst vegetable-tanned calf leather represents a valid option for those who prioritise breathability and conscious maintenance.

Changing the strap requires specific tools: a spring bar removal tool and a stable work surface. Position the watch with the case facing upwards, locate the lug to start from, insert the strap removal tool beneath the lug shoulder to gently lift the pin, extract the pin with fine tweezers, remove the worn strap and insert the new strap by aligning it with the holes, then reinsert the pin with constant pressure until it clicks into place.

Yes, any strap with a certified 20mm lug width is compatible with the Portugieser IW3716-16. However, the construction quality of the strap – leather thickness in the attachment area, stitching finish, thread choice – influences the longevity and aesthetic stability of the combination. Artisanal straps, handcrafted with noble leathers, guarantee a superior mechanical interface compared to industrial products.

A leather strap of superior quality (alligator or shell cordovan) has a lifespan of 5-7 years with daily use, provided correct maintenance: avoid prolonged exposure to water and direct sunlight, keep the leather hydrated with specific creams once monthly, and store the strap away from heat sources. Vegetable-tanned calf leather tends to reduce this lifespan to 3-4 years, as its fibrous structure is more susceptible to environmental moisture absorption.