Technical Archive

Breitling
Superocean A1736402BA30138S— lug 20mm

Breitling Superocean A1736402BA30138S: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Superocean 42

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Breitling A1736402BA30138S
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

A1736402BA30138S

Movement

Breitling caliber Caliber 17 Hours, Minutes, Seconds | Date

The Heritage

The Superocean is a Breitling dive watch equipped with the Caliber 17 that provides hour, minute, second and date indication. The reference A1736402BA30138S features essential functions for diving use. The movement guarantees standard time functions with a date complication.

FAQ

What is the lug width of the Breitling Superocean A1736402BA30138S?

The Breitling Superocean A1736402BA30138S has a lug width of 20mm. This measurement is taken internally between the two lugs, flush against the case back, using a digital calliper or a millimetre ruler. It is a standard size that ensures broad compatibility with aftermarket straps.

What is the best strap for the Breitling Superocean A1736402BA30138S?

The ideal choice depends on intended use. A vulcanised rubber strap is the most functional option for sport and marine environments. Vegetable-tanned calfskin offers the best all-round versatility for daily wear. For formal occasions, a matte alligator strap elevates the aesthetic register without undermining the watch's technical character. A deployant clasp in steel is recommended for those seeking a secure and comfortable fastening.

How do you change the strap on a Breitling Superocean A1736402BA30138S?

Strap replacement requires a double-pronged spring bar tool. Insert the fine tip into the lug hole, compress the spring bar and slide the strap free. Take care not to scratch the steel lugs — protect the case with a soft cloth during the operation. Reassembly follows the reverse procedure; always verify that the spring bars are correctly seated in both lug holes before wearing the watch.

Are there aftermarket straps compatible with the Breitling Superocean A1736402BA30138S?

Yes. The standard 20mm lug width ensures full compatibility with all quality aftermarket straps in that size. Milano Straps offers a curated selection of handcrafted straps in leather, alligator, calfskin and technical materials, all dimensioned for 20mm lugs, with customisation options for length, buckle and stitching.

How long does a leather strap last on a Breitling Superocean worn daily?

The lifespan of a leather strap depends on the quality of the hide, the tanning process and conditions of use. A high-quality vegetable-tanned calfskin strap worn daily without prolonged water exposure typically lasts between 18 and 36 months. Alligator, owing to its denser fibrous structure, tends to last longer but is less suited to intensive sporting use. Casati Milano provides an 18-month guarantee against manufacturing defects.