IWC · Big Pilot

Strap for Big Pilot's Watch Perpetual Calendar Platinum / Yellow

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width

22mm
Lug width22 mm
Case diameter46 mm
ReferenceIW5036-02 (aka: IW503602)
FamilyBig Pilot
MovementIWC caliber 52615 Hours, Minutes, Small Seconds | Date, Day, Month, Perpetual Calendar, Year Indicator | Moonphase | Power Reserve Indicator
CasePlatinum

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Big Pilot IW5036-02 (aka: IW503602)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Big Pilot IW5036-02 (aka: IW503602), seen from the bench

The IWC Big Pilot IW5036-02 Perpetual Calendar in solid platinum is the contemporary evolution of the legendary B-Uhr watches commissioned by the Luftwaffe in the 1940s for German fighter pilots. The 46.2mm platinum case houses the IWC caliber 52615, an automatic movement featuring a complete perpetual calendar with month, year, moonphase, and power reserve indicators. The watch features a 22mm lug width, precisely calculated for visual balance on the iconic oversized conical crown design that defines the Big Pilot collection's aeronautical heritage.

Frequently asked questions

What is the lug width of the IWC Big Pilot IW5036-02?

The lug width of the IWC Big Pilot IW5036-02 is 22mm. This measurement corresponds to the distance between the two lugs on the case where the strap attaches. Measuring this dimension accurately is essential for ensuring strap compatibility; use a digital calliper for precision.

Which strap type is recommended for the Big Pilot IW5036-02 in platinum?

For the Big Pilot IW5036-02 in platinum, alligator leather in dark shades (black, chocolate brown) or shell cordovan is recommended. Alligator creates sophisticated aesthetic contrast with the brushed platinum finish; shell cordovan develops a golden patina over time. For sporty applications, vegetable-tanned leather or natural rubber straps ensure structural integrity and waterproofing without compromise.

How do you change the strap on the IWC Big Pilot IW5036-02?

To change the strap, remove the spring bars from the case using a spring bar remover tool. Insert the tool's tip into the lateral spaces of the lug, compress the internal spring to release the bar end, and slide the strap out of the case. Repeat on the other side. The new strap is inserted by pressing the spring bars until they snap into position. Professional watchmaker assistance is recommended to prevent damage.

Is an aftermarket strap compatible with the Big Pilot IW5036-02?

Yes, any strap with a 22mm lug width is compatible with the Big Pilot IW5036-02. High-quality aftermarket straps in alligator, shell cordovan, calf leather, NATO, or natural rubber fit perfectly into the case lugs. Compatibility is guaranteed by the standardisation of lug width; the strap's construction quality determines comfort and longevity.

How long does a leather strap last on the Big Pilot IW5036-02?

Leather strap durability depends on material and usage patterns. Shell cordovan lasts 5-8 years with daily wear due to dense, resistant fibres. Alligator has a similar lifespan of 4-7 years. Vegetable-tanned leather ages more rapidly visually (2-4 years) but develops a compelling patina. Rubber or NATO straps last 3-5 years before degradation. Rotating seasonal straps significantly extends the life of each strap.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only