Breitling · Transocean

Strap for Transocean Day & Date Stainless Steel / Silver / Croco / Folding

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
ReferenceA4531012/G751/732P/A20D.1
FamilyTransocean
MovementBreitling caliber 45 hours, minutes, seconds | date, day | chronometer
Year2012
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 A4531012/G751/732P/A20D.1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Transocean A4531012/G751/732P/A20D.1, seen from the bench

The Breitling Transocean A4531012/G751/732P/A20D.1 is a stainless steel dress-sport watch from Breitling's line inspired by transatlantic aviation's golden age. It features a 43mm steel case with a thin bezel, clean dial with baton indices, and is powered by the Breitling Caliber 45 (COSC-certified chronometer) displaying hours, minutes, seconds, date, and day of week. The 22mm lug width is the historical standard for Breitling's high-end sports chronographs, requiring precise measurement between the lug shoulders for proper strap compatibility.

Frequently asked questions

What is the lug width of the Breitling Transocean A4531012/G751/732P/A20D.1?

The lug width of the Breitling Transocean A4531012/G751/732P/A20D.1 is 22mm. This measurement is taken internally between the two lug shoulders using a digital calliper positioned parallel to the caseback. Respecting this exact dimension is essential for correct strap insertion and to prevent premature wear of the keeper.

What is the best strap for the Breitling Transocean A4531012/G751/732P/A20D.1?

For the Transocean, a belly alligator strap with symmetrical grain is the most coherent choice given the model's dressy-sport character. Alternatively, a Tuscan vegetable-tanned calfskin develops a natural patina that enhances the dial's character over time. For more active use, a high-quality rubber strap maintains the sporty legibility of the watch without compromising the aesthetics of the 43mm case.

How do you change the strap on the Breitling Transocean A4531012/G751/732P/A20D.1?

To replace the strap, a spring bar tool — preferably with a forked tip — should be inserted into the slot between the strap and the lug to compress the spring bars. Remove one side first, then the other. It is advisable to work on a soft surface to protect the case. If you are not experienced with this procedure, it is best to consult a watchmaker or visit the Casati Milano atelier.

Are there aftermarket straps compatible with the Breitling Transocean A4531012/G751/732P/A20D.1?

Yes. Any strap with an upper width of 22mm and standard spring bars is technically compatible with the Breitling Transocean A4531012/G751/732P/A20D.1. Milano Straps offers a curated selection of handcrafted 22mm straps in various materials and finishes, produced at the Casati Milano atelier to the same quality standards as high-end original straps.

How long does a leather strap last on the Breitling Transocean A4531012/G751/732P/A20D.1?

Longevity depends on the material and daily use. A vegetable-tanned calfskin strap, with proper care — rotating between multiple straps and avoiding water immersion — typically lasts 2 to 4 years. Alligator, being more resistant to repeated flexing, can exceed 5 years if conditioned with a nourishing cream every 3 to 4 months. 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