Bremont · ALT1

Strap for ALT1-C Classic Silver

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter43 mm
ReferenceALT1CSI
FamilyALT1
MovementBremont caliber BE-50AE hours, minutes, small seconds | date | Chronograph | chronometer
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 ALT1 ALT1CSI

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The ALT1 ALT1CSI, seen from the bench

The Bremont ALT1-C Classic Silver is a British chronograph that represents the natural evolution of aviation timekeeping vision. It features a 43 mm stainless steel case with the BE-50AE Bremont chronometer-certified movement, combining Swiss mechanical heritage with functional understatement. The 22 mm lug width accommodates specifically dimensioned straps, while the austere dial with chronograph sub-dials and date window reflects genuine instrument design rather than visual excess.

Frequently asked questions

What is the lug width of the Bremont ALT1CSI?

The Bremont ALT1CSI has a lug width of 22 mm. This measurement, taken between the contact points of the lugs on the case, is essential for selecting compatible straps. Any strap you choose must have exactly this width to ensure stability and prevent unwanted movement on the case.

Which leather strap do you recommend for the ALT1CSI?

For the ALT1CSI, we recommend a vegetable-tanned leather strap of supreme quality, preferably in Havana brown or black. Vegetable tanning develops a natural patina over time, evolves with use, and preserves the pilot-watch character of the chronograph. Alternatively, cognac alligator in 1.4–1.6 mm thickness offers formal elegance with three-dimensional natural texture.

How do I change the strap on a Bremont ALT1CSI?

To change the strap, you must remove the spring bars that connect the strap to the lugs. Using a dedicated spring bar tool, apply gentle pressure toward the case centre to compress the bar and release the strap. Next, insert the new strap by sliding the bars into the slots. We advise against forcing: if the bar doesn't yield, verify you're applying the correct pressure.

Can I use a third-party strap on a Bremont ALT1CSI?

Absolutely. Provided the strap has a 22 mm lug width and compatible thickness (typically 1.4–1.8 mm depending on model), any quality aftermarket strap fits perfectly on the ALT1CSI. Milan Straps offers a selection of artisanal 22 mm straps specifically tested for this reference. Compatibility is guaranteed by precise lug measurement.

How long does a leather strap last on a Bremont ALT1CSI with daily wear?

A quality vegetable-tanned leather strap, worn daily on a chronograph like the ALT1CSI, typically lasts 18–36 months before requiring replacement. Lifespan depends on climate (humidity accelerates wear), frequency of wear, and maintenance (avoid prolonged moisture; occasionally apply dedicated protective products). A well-maintained strap can reach 4–5 years. Shell cordovan lasts longer thanks to fibre density.

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