Formex · Pilot

Strap for Pilot Quartz Chronograph Black / 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
Reference1100.1.3020.213
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 1100.1.3020.213

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Pilot 1100.1.3020.213, seen from the bench

The Formex Pilot reference 1100.1.3020.213 is equipped with a Ronda 5040.D quartz movement with hours, minutes, small seconds, date and chronograph functions. The watch features 22mm lugs for the strap. The movement offers the essential complications for a pilot's sports timepiece.

Frequently asked questions

What is the lug width of the Formex Pilot 1100.1.3020.213?

The Formex Pilot 1100.1.3020.213 is equipped with a lug width (ansa) of exactly 22mm. This measurement represents the distance between the inner points of each lug, and it is the critical parameter for selecting compatible straps. When purchasing an aftermarket strap, always verify that it is specifically designed for a 22mm lug width to avoid excessive play or impossible installation.

What is the best strap for the Formex Pilot 1100.1.3020.213?

There is no universal answer; the choice depends on your intended use and personal preferences. For a classic aviator aesthetic, a natural or cognac alligator strap underscores the watch's instrumental identity. For a warmer, artisanal character, Italian calf leather in vegetable tanning develops a beautiful patina over time. For pure tactical functionality, a military-grade textile NATO or FKM rubber strap excels in durability and minimal maintenance. Your choice should reflect the role this timepiece plays in your collection.

How do I change the strap on my Formex Pilot 1100.1.3020.213?

Strap replacement is accomplished by removing the spring bars that pass through the lugs. Place the watch on a soft cloth to prevent scratching. Using a dedicated spring bar tool or thin screwdriver, press the pin inward to release one end of the current strap. Repeat on the opposite side. Next, insert the spring bars into your new strap (ensuring it is sized for 22mm lugs) and press until they click firmly into place. Verify that the strap is centred and that both pins are fully secured before wearing the watch again.

Can I fit an aftermarket strap to my Formex Pilot 1100.1.3020.213?

Yes, absolutely. The 22mm lug width is one of the most common international standards, so there is a substantial selection of certified aftermarket straps available for this specification. It is essential to purchase from reputable manufacturers who respect precise tolerances, ensuring a perfect fit with no unwanted movement. Specialised brands offer leather, NATO fabric, and rubber straps specifically designed for 22mm lugs.

How long does a leather strap last on a watch like the Formex Pilot 1100.1.3020.213?

The lifespan of a leather strap depends on material quality, thickness, usage frequency, and climate exposure. A high-quality strap (alligator, vegetable-tanned calf, shell cordovan) with adequate thickness relative to the case diameter—generously supported by the 1100.1.3020.213's 46.50mm—can last 3–5 years with regular rotation and basic care (drying after rain, protection from excessive stress). NATO textile and FKM rubber straps, by contrast, offer superior resistance and require virtually no maintenance, making them ideal for intensive or exploratory use.

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