Strap for Big Pilot 43 Tourbillon Le Petit Prince Platinum

The lug width of the IWC Big Pilot IW3295-01 is 21 mm. This measurement corresponds to the internal distance between the case's spring bar pins and represents the standard for straps compatible with this platinum model. A tolerance of ±0.5 mm is generally acceptable.

Deep black alligator or dark brown alligator is the preferred choice for the Big Pilot in platinum, as it enhances the natural texture of the leather without adding decorative elements. Shell cordovan with vegetable tanning offers deep and silky patina over time. Vegetable-tanned calf leather in dark tones is a robust and elegant alternative. Avoid glossy or artificially treated leathers.

Changing the strap requires a dedicated tool (spring bar tool) to release the retaining rings that secure the pins. Insert the tool into the lateral groove of the lug and push inward to relieve pressure, then extract the pin. Position the new strap and reinsert the pin, ensuring it is securely fastened. We recommend having this done at Casati Milano for maximum precision.

Yes, aftermarket straps of 21 mm are compatible with the Big Pilot IW3295-01, provided they are manufactured to correct tolerances (±0.5 mm). Verify that the pins are of the same width and cross-section to ensure proper seating in the case lugs. Milanostraps.it straps have been tested on this reference.

The lifespan of a natural leather strap depends on the material and usage: alligator and shell cordovan maintain structural integrity for 3-5 years of daily wear, improving aesthetically with patina. Vegetable-tanned calf has similar longevity, whilst vulcanised rubber resists 5-7 years. Casati Milano's guarantee on bespoke straps is 18 months, covering manufacturing defects and material faults.