Formex · Pilot

Strap for Pilot Quartz Chronograph PVD / Black - Yellow / Bracelet

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
Reference1100.4.3084.110
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 1100.4.3084.110

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Pilot 1100.4.3084.110, seen from the bench

The Formex Pilot reference 1100.4.3084.110 is equipped with the Ronda 5040.D quartz caliber with functions of hours, minutes, small seconds, date and chronograph. The watch features 22mm lugs for the strap. The movement offers chronograph display along with standard time indications.

Frequently asked questions

What is the exact lug width of the Formex Pilot 1100.4.3084.110?

The Formex Pilot 1100.4.3084.110 features a lug width of 22 millimetres. This dimension is fixed and cannot be altered. To verify, measure the distance between the horizontal attachment pins located at 12 and 6 o'clock on the case. Any strap of different width will be incompatible and cause lateral play.

Which strap would you recommend for the Formex Pilot 1100.4.3084.110?

For a technical pilot watch such as the 1100.4.3084.110, we recommend leather with supreme vegetable tanning (Moro or Cognac tones) for balance between grip and authentic patina development, or alligator for superior elasticity and saltwater resistance. For aquatic or corrosive environments, military-grade nylon NATO or FKM (Viton) rubber represent uncompromising functional alternatives.

How do I change the strap on my Formex Pilot 1100.4.3084.110?

The Formex Pilot strap attaches via removable spring bars. Using a dedicated tool or fine flathead, press inward one of the elastic pins from beneath the case, slide it from the lug holes, then release the old strap. Insert the new 22mm strap into the holes and snap the pins into their seats. Pressure must be balanced on both sides to prevent damage.

Is a 22mm aftermarket strap truly compatible with the Formex Pilot 1100.4.3084.110?

Yes, provided it is genuinely 22 millimetres in width. Always measure before purchase: tolerances of ±0.2mm are normal, but 20mm or 24mm straps will not fit. Quality aftermarket straps (leather, NATO, rubber) are 100% compatible with the Formex case, provided they respect the specified lug width.

How long does a leather strap last on the Formex Pilot 1100.4.3084.110?

A premium leather strap (vegetable tanned, alligator, shell cordovan) with regular maintenance (monthly cleaning, quarterly conditioning) lasts 3–5 years in daily wear. Lifespan depends on humidity, frequency of use, and owner care. Leather progressively thins at the lugs, the critical point where mechanical stresses are highest. A rubber or NATO strap lasts 7–10 years without specialist maintenance.

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