Strap for Big Pilot Perpetual Calendar Platinum / Black / Sincere

The lug width of the IWC Big Pilot IW5026-05 is 22mm. This dimension is specific to this model and results directly from the proportions of the 46.20mm case. It is incompatible with 20mm or 24mm straps. To measure accurately, use a digital calliper or ruler positioned perpendicular to the original strap lugs: the distance between the two lugs is the lug width.

The ideal choice depends on usage and personal preference. For absolute elegance, dark brown alligator or shell cordovan in Burgundy tones represent the pinnacle: they dialogue with the nobility of platinum creating visual balance. For extreme durability, shell cordovan develops a fascinating patina over time. For practicality (intensive use, humid environments), NATO strap in dark grey Cordura or black FKM rubber maintains authority without functional compromise.

The strap is secured using spring bars (lugs pins) that pass through the lug holes of the case. To remove: (1) obtain a spring bar removal tool or a blunt knife; (2) insert the tip into the space between the lug and the pin, applying gentle inward pressure; (3) the pin will spring out; (4) repeat on the other side. Insert the pins into the new strap, aligning the holes and pressing until they lock into position. On a watch of this calibre, it is advisable to have the operation performed at an authorised service centre to avoid scratches.

Yes, provided the lug width is exactly 22mm. Many artisanal aftermarket straps are constructed in this specific width. Always verify the technical specifications before ordering. Straps made by experienced craftsmen (such as those available at milanostraps.it) guarantee mechanical compatibility and aesthetic harmony with the platinum case.

Longevity depends on the type of leather and usage. Alligator leather with vegetable tanning typically lasts 3–5 years with moderate use (daily but protected). Shell cordovan, due to its natural cellular density, can exceed 10 years. Calf leather is less resistant (2–4 years). Artisanal straps constructed with careful tailoring and noble materials (such as those by Casati Milano) extend durability thanks to construction quality and protective finishes. Exposure to moisture, heat and perspiration accelerates wear; periodic maintenance (gentle cleaning, conditioning) significantly extends service life.