Strap for Big Pilot Perpetual Calendar Red Gold / Black / Salto Angel

The lug width of the IWC Big Pilot IW5026-15 is precisely 22mm. This dimension is specific to this reference and essential to ensure smooth passage of the strap through the case lugs. To verify, insert a digital calliper between the lugs at the narrowest point: the reading must correspond exactly to 22mm. Any deviation would compromise the stability of the assembly.

For a Big Pilot IW5026-15 in rose gold, we recommend alligator leather with vegetable tanning: the geometric texture of the scales naturally complements the richness of the metal, and the evolving patina synchronises the ageing of the strap with the natural oxidation of rose gold. Alternatively, vegetable-tanned calf offers greater chromatic versatility and proven resistance to daily wear. For more sporty use, a high-quality rubber strap with contrasting stitching maintains the gravitas of the instrument.

Changing the strap on the Big Pilot requires extraction of the spring bars (springe pins) through the appropriate hole on each side of the case. Use a spring bar tool: insert the tip into the slot and apply gentle upward pressure to release the spring. Once both bars are extracted, the old strap separates easily. Fit the new strap by inserting the bars into the holes and verify that the spring clicks into position with an audible click. We recommend entrusting a qualified watchmaker with the first operation, given the value of the timepiece.

Yes, it is possible to use quality aftermarket straps on a Big Pilot IW5026-15, provided they strictly respect the 22mm lug width. However, verify that the strap meets comparable construction standards: the quality of the tanning, the precision of the stitching and the durability of the leather are fundamental parameters for a watch of this calibre. A budget strap would risk detracting from the aesthetic and functional value of the instrument.

The durability of a leather strap depends on the tanning method and daily use. A superior quality vegetable-tanned leather maintains structural integrity for 3-5 years with moderate wear. Alligator with vegetable tanning can exceed 5 years thanks to the natural robustness of the scale. The critical factor is moisture exposure: wearing the Big Pilot during showers, frequent rain or water sports accelerates degradation. Alternating the strap with others significantly reduces the rate of ageing and preserves aesthetic patina.