Breitling · Transocean

Strap for Transocean Chronograph Stainless Steel / Black / Croco / Pin

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
ReferenceAB015212/BA99/739P/A20BA.1
FamilyTransocean
MovementBreitling caliber B01 hours, minutes, small seconds | date | Chronograph, column wheel | chronometer
Year2011
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 Transocean AB015212/BA99/739P/A20BA.1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Transocean AB015212/BA99/739P/A20BA.1, seen from the bench

The Breitling Transocean AB015212/BA99/739P/A20BA.1 traces its origins to 1958 when Breitling introduced the first Transocean as a flight chronograph for intercontinental pilots. The stainless steel case measures 43 mm and houses the in-house Breitling Caliber B01, a column-wheel chronograph movement certified chronometer COSC. The strap width for this reference is 22 mm, requiring dedicated straps to ensure proper fit without lateral play or funneling effect.

Frequently asked questions

What is the lug width of the Breitling Transocean AB015212/BA99/739P/A20BA.1?

The lug width of the Breitling Transocean AB015212/BA99/739P/A20BA.1 is 22 mm. This measurement should be taken between the inner edges of the lugs using a digital calliper to ensure precise strap compatibility.

What is the best strap for the Breitling Transocean AB015212/BA99/739P/A20BA.1?

The most appropriate options for the Transocean are vegetable-tanned calf leather in cognac or tobacco, smooth alligator in midnight blue for formal occasions, and shell cordovan for those seeking a strap that develops a distinctive patina over time. The correct lug width is 22 mm.

How do you change the strap on the Breitling Transocean AB015212/BA99/739P/A20BA.1?

The strap is removed using a flat-tipped springbar tool to compress the spring bar connecting the strap to the case. It is advisable to work on a soft surface to avoid scratching the stainless steel case. The procedure takes approximately two minutes for an experienced operator.

Are there aftermarket straps compatible with the Breitling Transocean AB015212/BA99/739P/A20BA.1?

Yes, any strap with a 22 mm lug width is technically compatible. Milano Straps offers handcrafted straps in leather, alligator, shell cordovan and rubber made specifically for this size, with steel buckles and deployant clasps to match the original case.

How long does a leather strap last on a Breitling Transocean?

A quality leather strap with vegetable tanning and hand-finished edges typically lasts between 2 and 4 years with daily wear, depending on exposure to perspiration, water and sunlight. Milano Straps products carry an 18-month guarantee 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