Formex · Pilot

Strap for Pilot Quartz Chronograph Silver / Calf

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

Lug width22 mm
Case diameter47 mm
Reference1100.1.3040.223
FamilyPilot
MovementRonda caliber 5040.D Hours, Minutes, Small Seconds | Date | Chronograph
CaseTitanium, Stainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the Pilot 1100.1.3040.223

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Pilot 1100.1.3040.223, seen from the bench

The Formex Pilot is a Swiss chronograph with a 46.5mm titanium and steel case, powered by the Ronda caliber 5040.D movement offering hours, minutes, small seconds, date, and chronograph function with ±30 seconds annual precision and 1/10 second chronograph resolution. The 22mm lug width accommodates robust straps suitable for the case mass without disproportionate aesthetics. Reference 1100.1.3040.223 positions this model in the professional chronograph category, rooted in Rapperswil's aeronaval heritage.

Frequently asked questions

What is the lug width of the Formex Pilot 1100.1.3040.223?

The lug width of the Formex Pilot 1100.1.3040.223 is 22mm (0.87 inches). This width is measured from shoulder to shoulder at the widest point where the strap meets the case lugs. It is essential to verify this exact measurement before purchasing an aftermarket strap to ensure perfect compatibility.

Which strap material pairs best with the Formex Pilot?

For the Formex Pilot, the ideal strap material depends on intended use and aesthetic preference. Alligator leather in vegetable tanning offers elegance and develops natural patina over time. Cordovan or tan vitello in tabacco or dark brown tones dialogues beautifully with the grey titanium and satin-finished steel. NATO straps remain the sportwear choice for dynamic contexts. Modern rubber with textured relief ensures superior grip in wet environments.

How do you change the strap on the Formex Pilot 1100.1.3040.223?

To change the strap on the Formex Pilot, remove the spring bars that secure the strap to the lugs. Using a spring bar tool or thin implement, push the bar toward the case centre from one side to release the opposite end. Remove the bar completely, take off the old strap, position the new strap under the lugs, and reinsert the spring bar ensuring it is correctly seated on both sides.

Will aftermarket straps with 22mm lug width fit the Formex Pilot?

Yes, any strap with a 22mm lug width is compatible with the Formex Pilot 1100.1.3040.223, regardless of manufacturer. Compatibility depends exclusively on lug width, not brand. However, we recommend selecting artisanal straps of certified quality to ensure durability and aesthetic coherence with the technical dignity of the timepiece.

How long does a leather strap last on the Formex Pilot?

The lifespan of a leather strap depends on tanning quality, usage patterns, and maintenance. A high-quality vegetable-tanned strap can last 3–5 years with daily wear and regular maintenance (cleaning and conditioning with specialist creams). The patina that develops is not deterioration but acquired character. Prolonged exposure to humidity, direct sunlight, and sweat contact accelerates ageing. Vitello or alligator straps from specialised ateliers often exceed 5 years of useful life.

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