Ball Watch · Fireman

Strap for Fireman Storm Chaser Pro Stainless Steel / White / Calf

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter42 mm
ReferenceCM3090C-L1J-BK
FamilyFireman
MovementBall Watch caliber RR1402 Hours, Minutes, Small Seconds | Date | Chronograph
CaseStainless 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 Fireman CM3090C-L1J-BK

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Fireman CM3090C-L1J-BK, seen from the bench

The Ball Watch Fireman reference CM3090C-L1J-BK is equipped with the RR1402 caliber with hour, minute, small seconds, date and chronograph functions. The movement offers essential time indications combined with the chronograph complication. The watch represents the technical line of the Ball Watch brand dedicated to fire protection professionals.

Frequently asked questions

What is the lug width of the Ball Watch Fireman CM3090C-L1J-BK?

The Ball Watch Fireman CM3090C-L1J-BK features a lug width of 20mm. This measurement is decisive for aftermarket strap compatibility: it allows the installation of any strap specialised in this standard width. To verify conformity, measure the distance between the horizontal pins protruding from the case.

Which strap is most suitable for the Ball Watch Fireman CM3090C-L1J-BK?

For the CM3090C-L1J-BK we recommend alligator leather, which expresses tactile elegance and structural resistance. Vegetable-tanned calf represents a sustainable alternative for those appreciating evolutionary patina. NATO straps are the tactical choice for those requiring versatility and rapid changes. Structured rubber proves practical in humid environments or high-contact scenarios.

How do you change the strap on the Ball Watch Fireman CM3090C-L1J-BK?

Use a dedicated spring bar tool for pin extraction. Position the watch on a stable surface, insert the fine tip of the tool into the lateral hole of the lug, compress gently to release the pin from its seat, then extract with delicate movement. Repeat on the opposite side. Insert the new strap by aligning the pins to the lugs, compressing until the safety click engages.

Are compatible aftermarket straps available for this lug width?

Yes, Milano Straps offers a comprehensive collection of 20mm straps, carefully selected for watches of this size and architecture. You may choose from alligator leather, vegetable-tanned calf, structured NATO, and technical rubber. All straps are ready for dispatch and customisable according to your aesthetic requirements.

What is the average lifespan of a leather strap for the Ball Watch Fireman?

A quality vegetable-tanned leather strap has an average lifespan of 18–36 months with daily use. Alligator, being a more resistant material, extends to 40–48 months. Longevity depends on ambient humidity, direct sun exposure, and maintenance frequency. Periodically rotating straps and protecting them from extreme moisture significantly extends their operational 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