Ball Watch · Fireman

Strap for Fireman Storm Chaser Stainless Steel / Grey / Bracelet

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

Lug width20 mm
Case diameter43 mm
ReferenceCM2092C-S-GY
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 CM2092C-S-GY

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Fireman CM2092C-S-GY, seen from the bench

The Ball Watch Fireman CM2092C-S-GY is a 43mm stainless steel chronograph from Ball Watch's professional instrument line, featuring the RR1402 chronographic movement with hours, minutes, small seconds, and date functions. The watch has a 20mm lug width and includes a unidirectional bezel characteristic of chronographs designed for professional use. Built to withstand extreme thermal, mechanical, and environmental stress, this model exemplifies Ball Watch's heritage as a manufacturer of robust, reliable timekeeping instruments since 1891.

Frequently asked questions

What is the lug width of the Ball Watch Fireman CM2092C-S-GY?

The lug width of the Ball Watch Fireman CM2092C-S-GY is 20mm. This measurement represents the internal distance between the two spring bars that protrude from the case and accommodate the strap. It is essential to measure this dimension accurately before ordering an aftermarket strap, as even a minimal difference (19mm or 21mm) would result in incompatibility with the case attachment point.

Which strap is best for the Ball Watch Fireman CM2092C-S-GY?

There is no universally optimal choice; the decision depends on intended use. For aesthetic refinement, an alligator strap with vegetable tanning offers natural patina and tactile comfort. For durability and minimal maintenance, shell cordovan guarantees longevity and develops characteristic patina over time. A NATO strap in technical fabric provides sporty practicality and wear resistance. For extreme conditions (humidity, heat), FKM vulcanised rubber ensures superior functional performance.

How do you change the strap on a Ball Watch Fireman CM2092C-S-GY?

Strap replacement is accomplished by extracting the spring bars from their seatings on the case. Using a dedicated tool (Y-shaped or fork-shaped), apply gentle inward pressure against the case to disengage the bars from the lug structure. Once released, the bars slide horizontally, allowing removal of the old strap and installation of the new one. Verify that the bars are completely seated in their new slots before wearing the watch.

Are there compatible aftermarket straps for the Ball Watch Fireman CM2092C-S-GY?

Yes. Any strap with a 20mm lug width is geometrically compatible with the CM2092C-S-GY. The market offers straps in full-grain leather, shell cordovan, vegetable-tanned alligator, NATO fabric, technical FKM rubber, and even third-party metal bracelets. Compatibility is ensured by lug width, whilst material choice depends on aesthetic preferences and usage conditions.

How long does a leather strap last on a Ball Watch Fireman CM2092C-S-GY?

Leather strap longevity depends on tanning type and intensity of use. A vegetable-tanned or shell cordovan strap, subjected to daily wear and regular maintenance (gentle cleaning, protection from prolonged water exposure), can last 3–5 years, with patina improving over time. A NATO fabric strap resists mechanical wear and humidity longer. A vulcanised FKM rubber strap guarantees unaltered performance for 5–7 years of intensive use, regardless of environmental conditions.

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