Breitling · Super Chronomat

Strap for Super Chronomat B01 44 Stainless Steel / Black / Rouleaux - UTC

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

Lug width20 mm
Case diameter44 mm
ReferenceAB0136251B1A2
FamilySuper Chronomat
MovementBreitling caliber Caliber B01 Hours, Minutes, Small Seconds | Date | Chronograph, Column wheel | Chronometer
CaseCeramic, Stainless Steel

Spring bar

Swiss Standard universal spring bars

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

The Super Chronomat AB0136251B1A2, seen from the bench

The Super Chronomat represents the modern evolution of the Breitling chronograph line. It is powered by the in-house automatic B01 caliber with column-wheel chronograph function and chronometer certification. The movement offers indication of hours, minutes, small seconds, date and chronograph.

Frequently asked questions

What is the lug width of the Breitling Super Chronomat AB0136251B1A2?

The lug width of the Breitling Super Chronomat AB0136251B1A2 is 20mm. This measurement is taken at the narrowest point between the two case lugs using a digital calliper. It is the value required when ordering a replacement or aftermarket strap compatible with this reference.

What is the best strap for the Breitling Super Chronomat AB0136251B1A2?

The ideal choice depends on intended use and personal style. For a dressed-up register, a hornback or mississippiensis alligator strap in vegetable-tanned leather offers the most refined result. For everyday sport use, vulcanised rubber or a ballistic nylon NATO provide durability and practicality. A hand-patinated calf strap strikes the balance between character and versatility.

How do you change the strap on a Breitling Super Chronomat AB0136251B1A2?

The Super Chronomat secures its Rouleaux bracelet via standard 20mm spring bars. To replace it, use a spring bar tool (pointed or forked tip) to compress and remove the spring bars from the lugs, then detach the bracelet. Insert the replacement strap ensuring the spring bars are the correct length for the internal lug width. The operation takes only a few minutes and requires no specialist equipment.

Are there aftermarket straps compatible with the Breitling Super Chronomat AB0136251B1A2?

Yes. Any strap with a 20mm attachment width is technically compatible with the Super Chronomat AB0136251B1A2, provided the spring bars are the appropriate length for this case. Milano Straps offers a curated selection of handcrafted 20mm straps in various materials, designed to pair precisely with this Breitling reference both dimensionally and aesthetically.

How long does a leather strap last on a Breitling Super Chronomat?

The lifespan of a leather strap depends on the material, tanning method, and conditions of use. A quality vegetable-tanned alligator strap, with regular care, will last between three and five years with daily wear. Calf leather typically has a shorter lifespan of one to three years but develops an attractive patina over time. Minimising exposure to water and perspiration significantly extends the strap's longevity. Milano Straps provides an 18-month warranty against manufacturing defects.

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