Strap for Superocean Heritage '57 Stainless Steel / Rainbow Boutique Limited Edition / Calf / Folding

The lug width of the Breitling Superocean Heritage '57 A103701A1B1X2 is 20 mm. This measurement should be taken using a digital calliper placed between the two lugs, at the point closest to the case, not at the tip of the lug. Accurate measurement at the base of the lug is essential when ordering a bespoke or aftermarket strap.

The ideal choice depends on the intended context. For formal or collector use, a 20 mm alligator hornback strap in midnight blue or black complements the brushed stainless steel case. For everyday urban wear, a vegetable-tanned calfskin strap develops a genuine patina over time. A technical nylon NATO strap suits summer or active use, while a vulcanised rubber strap is the most technically appropriate option for actual water exposure, consistent with the watch's 200-metre water resistance rating.

Strap replacement requires a fine-tipped or lever-type spring bar tool, inserted into the notch at the side of the lug to compress and release the spring bar. Work on a soft surface to protect the case back and polished surfaces. The standard spring bar for this reference is 20 mm wide. If you are not experienced with the procedure, it is advisable to have the strap changed by a watchmaker or the strap manufacturer's atelier.

Yes. The aftermarket offers a wide range of straps compatible with the 20 mm lug width of the Superocean Heritage '57. Milano Straps produces handcrafted straps in alligator, vegetable-tanned calfskin, shell cordovan and rubber, all fitted with standard 20 mm spring bars. Compatibility is determined solely by lug width and requires no adapters. Always verify total strap length against your wrist circumference and case thickness before ordering.

The lifespan of a leather strap depends on hide quality, tanning method and conditions of use. A quality vegetable-tanned calfskin strap, kept away from water, salt and excessive perspiration, can last between two and five years while retaining structural integrity. Frequent exposure to seawater or chlorinated water degrades leather fibres rapidly: for a dive watch used regularly in water, rubber or nylon NATO straps are technically more appropriate. Leather remains the preferred choice for dry, everyday or formal use.