Breitling · Cockpit B50

Strap for Cockpit B50 Titanium / Grey / Rubber / Folding

Takes 24 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width24 mm
Case diameter46 mm
ReferenceEB5010B1/M532/155S/E20DSA.4
FamilyCockpit B50
MovementBreitling caliber Caliber B50 Additional 24 Hour Hand (adjustable), Hours, Minutes, Seconds | Date, Day, Month, Perpetual Calendar, Year Indicator | Chronograph, Countdown, Flyback, Rattrapante | Alarm | Chronometer, Power Reserve Indicator
CaseTitanium

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Cockpit B50 EB5010B1/M532/155S/E20DSA.4

Selected for the 24 mm lug width · workshop selection

All 24 mm straps →

The Cockpit B50 EB5010B1/M532/155S/E20DSA.4, seen from the bench

The Breitling Cockpit B50 EB5010B1/M532/155S/E20DSA.4 is a 46 mm titanium aviation chronograph with a 24 mm lug width and SuperQuartz™ thermocompensated movement. It features a complex modular architecture including rattrapante and flyback chronograph functions, countdown, 24-hour subdial, perpetual calendar with separate day/month/year indicators, and power reserve display. The titanium case offers corrosion resistance and reduced weight for professional aviation use.

Frequently asked questions

What is the lug width of the Breitling Cockpit B50 EB5010B1/M532/155S/E20DSA.4?

The lug width of the Breitling Cockpit B50 EB5010B1/M532/155S/E20DSA.4 is 24 millimetres. This width is specific to B50 models and is measured on the inner shoulder of the lug where it attaches to the case. The 24mm width was chosen by Breitling to maintain proper proportions with the 46-millimetre case whilst ensuring rotational stability without excessive weight addition.

What is the best material for an aftermarket strap on the Cockpit B50?

The best material depends on intended usage. For formal and professional contexts, alligator (with vegetable or chrome tanning) offers sartorial elegance and visible grain texture. For daily versatility, vegetable-tanned calf provides natural patina development and pronounced texture. For tactical and outdoor use, vulcanised rubber resists moisture and extreme temperatures. Ballistic nylon NATO ensures versatility and rapid interchangeability.

How do you change the strap on a Breitling Cockpit B50?

The strap is changed by removing the spring bars connecting the strap to the case. Use a spring bar tool: insert the lever into the small hook of the spring bar, lift slightly to compress the internal spring, and slide the strap outward. Once both lugs are freed, align the new strap's holes with the spring bars, press the strap inward until the bar locks, then verify proper retention. Operation time: 2–3 minutes.

Which aftermarket straps are compatible with the 24mm Cockpit B50?

All straps with an exact 24-millimetre lug width are compatible. Milano Straps offers an online selection of dedicated 24mm straps ready for shipment, customisable for length, initials, and stitching thread colour. The Casati Milano atelier produces bespoke straps to order with personal leather selection (alligator, calf, cordovan, etc.) and an 18-month guarantee.

How long does a leather strap last on a Breitling Cockpit B50?

Leather strap longevity depends on leather quality, usage frequency, and environmental conditions. An artisanal-quality alligator or calf strap (such as those from Milano Straps) typically lasts 3–5 years with daily wear, developing characteristic patina. Alligator leather, thanks to its more robust fibre structure, tends to outlast calf. Factors accelerating wear: prolonged sun exposure, persistent humidity, extreme temperatures. With regular maintenance (cleaning, light conditioning), longevity increases significantly.

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