Bremont · ALT1

Strap for ALT1-C Classic Black

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
ReferenceALT1CBK
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 ALT1CBK

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The ALT1 ALT1CBK, seen from the bench

The Bremont ALT1-C Classic Black is a 43mm stainless steel chronograph watch with a 22mm lug width, representing modern British watchmaking applied to aviation needs. It features the internal caliber BE-50AE automatic movement, COSC-certified chronometer with split-seconds chronograph, offset small seconds, and date window. The bidirectional bezel enables precise timing for professional pilots and serves as a functional tool rather than ornamental element.

Frequently asked questions

What is the exact lug width of the Bremont ALT1 ALT1CBK?

The Bremont ALT1 ALT1CBK features a lug width of 22 millimetres. This dimension was selected by Bremont's design team to maintain optimal proportionality on the 43mm case. The lugs are straight and standard, making the watch fully compatible with certified 22mm aftermarket straps.

Which strap is most suitable for the Bremont ALT1 ALT1CBK?

The ideal choice depends on intended use. An alligator strap with vegetable tanning is perfect for formal and semi-formal contexts, offering elegance and conscious ageing. A premium NATO strap in regenerated yarn maintains the tool watch identity with aesthetic versatility. A structured calf leather strap provides the finest balance between durability and refinement. An FKM rubber strap represents the pure technical solution, resistant to chemical agents and extreme temperatures.

How do I change the strap on my Bremont ALT1 ALT1CBK?

Changing the lugs on the Bremont ALT1 ALT1CBK requires a specific tool: a spring bar tool (lug lever). Position the bifurcated end of the lever beneath the lug, gently lift until the internal spring is released, then extract the lug from the first case horn. Repeat on the opposite side. Insert the new strap's lugs in reverse sequence. Ensure both lugs are fully seated and the strap is perfectly aligned with the case before wearing the watch.

Can I use an aftermarket strap on a Bremont ALT1 ALT1CBK?

Yes, absolutely. The ALT1CBK features straight standard lugs, presenting no particular compatibility constraints. It is sufficient to verify that the strap is certified for 22mm lug width. Aftermarket straps in leather, NATO, rubber and regenerated textile are all compatible, provided the lugs are correctly dimensioned.

How long does a leather strap last on a Bremont ALT1 ALT1CBK?

The lifespan of a leather strap depends on leather quality and usage patterns. An artisanal calf leather strap with vegetable tanning or shell cordovan, worn daily, can easily last 5-7 years, developing a desirable patina over time. Direct sunlight exposure, excessive heat and prolonged humidity can reduce this longevity. Periodic maintenance (cleaning, light conditioning) significantly extends the strap's useful 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