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/G751/745P/A20BA.1
FamilyTransocean
MovementBreitling caliber Caliber 45 Hours, Minutes, Seconds | Date, Day | Chronometer
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/G751/745P/A20BA.1

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Transocean A4531012/G751/745P/A20BA.1, seen from the bench

The Breitling Transocean features the caliber 45 with hour, minute, second, date and day functions, certified as a chronometer. The model has 22mm lugs and belongs to the collection dedicated to transocean civil aviation. The case houses an automatic movement with day of the week and date indication.

Frequently asked questions

What is the lug width of the Breitling Transocean A4531012/G751/745P/A20BA.1?

The lug width of the Breitling Transocean A4531012/G751/745P/A20BA.1 is 22mm. This is the measurement to specify when purchasing an aftermarket strap. The taper towards the buckle is typically 20mm.

What is the best strap for the Breitling Transocean A4531012/G751/745P/A20BA.1?

Given the dress-sport character of the Transocean, an alligator belly strap or a vegetable-tanned calf leather strap represents the most coherent pairing. Alligator enhances the elegance of the smooth case; calf leather develops a distinctive patina over time. For everyday use, a heavy nylon NATO strap is practical and true to the brand's aviation heritage.

How do you change the strap on the Breitling Transocean A4531012/G751/745P/A20BA.1?

Strap replacement is carried out via the spring bars that connect the strap to the case lugs. A spring bar tool is required to release the bars and fit the new strap. Care should be taken to avoid scratching the stainless steel case; placing a soft cloth beneath the tool is recommended practice.

Are there aftermarket straps compatible with the Breitling Transocean A4531012/G751/745P/A20BA.1?

Yes. Any 22mm strap tapering to 20mm at the buckle is compatible with the Breitling Transocean A4531012/G751/745P/A20BA.1. MilanoStraps offers a curated selection of handcrafted leather, rubber, and NATO straps for this lug width, with bespoke options available through the Casati Milano atelier.

How long does a leather strap last on a Breitling Transocean A4531012/G751/745P/A20BA.1?

Longevity depends on the leather type and frequency of use. A quality vegetable-tanned calf strap used daily typically lasts 2–4 years. Shell cordovan, owing to its dense fibre structure, can exceed 5 years. First-cut alligator, properly maintained with neutral conditioners, offers comparable longevity. MilanoStraps provides 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