Breitling · Superocean

Strap for Superocean II 42 Stainless Steel / Volcano Black / Rubber / Folding

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

Lug width20 mm
Case diameter42 mm
ReferenceA17365C91B1S2 (aka: A17365C9/BD67/151S/A18D.4)
FamilySuperocean
MovementBreitling caliber Caliber 17 Hours, Minutes, Seconds | Date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

The Superocean A17365C91B1S2 (aka: A17365C9/BD67/151S/A18D.4), seen from the bench

The Breitling Superocean features the Caliber 17 with hours, minutes, seconds and date indication. The watch has 20mm lugs and uses the A17365C91B1S2 reference. The model is designed for underwater use with essential diving functions.

Frequently asked questions

What is the lug width of the Breitling Superocean A17365C91B1S2?

The Breitling Superocean A17365C91B1S2 has a lug width of 20mm. This measurement should be taken with a calliper at the point where the strap attaches to the case, between the two lugs. Any strap with a 20mm head width is compatible without the need for adapters.

What is the best strap for the Breitling Superocean A17365C91B1S2?

The ideal choice depends on intended use. For aquatic environments, a vulcanised rubber or high-density silicone strap provides waterproofing and comfort. For daily or formal wear, an alligator strap with vegetable tanning or a shell cordovan strap enhances the professional aesthetic of the Superocean. A heavy-weave nylon NATO strap is the most historically coherent option given the model's military heritage.

How do I change the strap on a Breitling Superocean A17365C91B1S2?

The strap is removed using a fine-tipped or flat spring bar tool, applying gentle leverage to the spring bar housed within the lug. It is advisable to work on a soft surface to avoid scratching the stainless steel case. For rubber straps with screw attachments, a flat-head screwdriver of the appropriate size is required.

Are there aftermarket straps compatible with the Breitling Superocean A17365C91B1S2?

Yes. Any strap with a 20mm head width is technically compatible with the Breitling Superocean A17365C91B1S2. Milanostraps.it offers a curated selection of handcrafted straps in various leathers and materials, with shaped ends designed to fit the specific lug geometry of Breitling cases. Bespoke straps can also be commissioned through the Casati Milano atelier.

How long does a leather strap last on a Breitling Superocean A17365C91B1S2?

Longevity depends on leather quality, tanning method, and conditions of use. An alligator or shell cordovan strap with vegetable tanning, worn under normal conditions and kept away from water, can last between 3 and 7 years, developing a distinctive patina over time. Frequent exposure to perspiration and moisture significantly shortens the strap's lifespan; in such cases, alternating with a rubber or NATO strap is strongly recommended.

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