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Formex · Pilot

Strap for Formex Pilot 1100.1.3040.223

The 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 width

22mm
22 mm strapsAll Formex
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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

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What I'm asked about the Formex Pilot 1100.1.3040.223

What strap size does the Formex Pilot 1100.1.3040.223 take?

The Formex Pilot 1100.1.3040.223 needs 22 mm between the lugs, usually 18 or 20 mm at the buckle. It's the size I've been fitting on it for years.

Can the strap on the Formex Pilot 1100.1.3040.223 be changed?

Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.

Can I put a leather strap on the Formex Pilot 1100.1.3040.223?

Yes, in 22 mm leather. On a 47 mm chronograph I like box calf: it holds its shape and carries a substantial case.

Which strap do you recommend for the Formex Pilot 1100.1.3040.223?

A 22 mm box calf. You'll find it ready in the 22 mm collection. If you'd rather have something built on your wrist, the Casati atelier.

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

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 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

The atelier's website: casatimilano.com