Breitling · Transocean

Strap for Transocean Day & Date Stainless Steel / Silver / 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
ReferenceA4531012/G751/739P/A20BA.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/G751/739P/A20BA.1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Transocean A4531012/G751/739P/A20BA.1, seen from the bench

The Breitling Transocean A4531012/G751/739P/A20BA.1 is a 43mm stainless steel chronograph derived from the 1958 aviation watch lineage for intercontinental pilots. It features the COSC-certified Breitling Caliber 45 movement with chronometer precision between -4 and +6 seconds per day, offering day-date complication and centralized hour, minute, second functions. The 22mm lug width accommodates standard aftermarket straps without adapters, with lugs tapering smoothly toward the strap attachment point.

Frequently asked questions

What is the lug width of the Breitling Transocean A4531012/G751/739P/A20BA.1?

The lug width of the Breitling Transocean A4531012/G751/739P/A20BA.1 is 22mm. This measurement refers to the internal distance between the two lugs, taken at the point of contact with the case using a digital calliper. Most quality aftermarket straps for this reference feature a 22mm attachment width tapering to 20mm at the buckle end.

What is the best strap for the Breitling Transocean A4531012/G751/739P/A20BA.1?

The ideal choice depends on the intended context. For formal occasions, a Mississippiensis alligator strap with a glossy grain complements the polished and brushed finishing of the stainless steel case. For everyday wear, vegetable-tanned Tuscan leather in cognac or tobacco tones develops an authentic patina over time. For practicality and durability, a ballistic nylon NATO strap maintains visual coherence with the Transocean's aeronautical heritage.

How do you change the strap on a Breitling Transocean A4531012/G751/739P/A20BA.1?

The strap is removed using a fine-tipped or fork-style spring bar tool. Insert the tool into the gap between the lug and the spring bar, compress the bar and slide the strap free. To avoid scratching the stainless steel case, it is advisable to protect the lug area with masking tape before working. Fitting the new strap is performed in reverse order.

Are there aftermarket straps compatible with the Breitling Transocean A4531012/G751/739P/A20BA.1?

Yes. Any strap with a 22mm attachment width is compatible with the Breitling Transocean A4531012/G751/739P/A20BA.1, provided the top ends are flat or very slightly curved, as per standard. MilanoStraps offers a curated selection of handcrafted 22mm straps in Tuscan leather, alligator, shell cordovan and technical materials, all supplied with spring bars included.

How long does a leather strap last on a Breitling Transocean A4531012/G751/739P/A20BA.1?

The lifespan of a leather strap depends primarily on leather quality, tanning method and daily use. A premium vegetable-tanned Tuscan leather strap worn daily typically lasts between two and four years before mechanical wear at the keeper becomes significant enough to warrant replacement. Avoiding prolonged exposure to water and perspiration, and storing the watch without tension on the strap, will substantially extend its service 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