Breitling
Transocean AB015112/BA59/154A— lug 20mm

The lug width of the Breitling Transocean AB015112/BA59/154A is 20mm. This measurement refers to the internal distance between the two lugs and should be verified with a vernier calliper to ensure a precise fit for any replacement strap.

For the Transocean AB015112/BA59/154A, the most suitable options are belly-cut alligator with vegetable tanning for formal occasions, or fine-grain calf leather or shell cordovan for daily wear. Colours such as tobacco, burgundy or midnight blue complement the watch's aeronautical and dress dual character. A deployante clasp is recommended for those wearing the watch all day, as it reduces daily stress on the leather.

To replace the strap on the Transocean AB015112/BA59/154A, you will need a fine-tipped spring bar tool. Insert the tip into the lug hole or the lateral channel of the spring bar, compress the spring, and slide the bar out. Take care not to scratch the satin-finished surfaces of the case. If in doubt, entrust the operation to a watchmaker or the Casati Milano atelier.

Yes, any standard 20mm strap is compatible with the Transocean AB015112/BA59/154A, provided the end geometry fits correctly against the lug profile. Milano Straps offers a curated selection of handcrafted 20mm straps — in leather, NATO and technical materials — specifically checked for compatibility with this Breitling case.

Longevity depends on the leather type and usage: a well-maintained vegetable-tanned alligator strap can last between 3 and 7 years with regular wear. Calf leather typically lasts 2 to 4 years. Factors such as perspiration, prolonged water exposure and lack of maintenance significantly reduce service life. Casati Milano straps carry an 18-month warranty against manufacturing defects.