Breitling
Chronomat 36 K103801A1C1K1— lug 18mm

The Breitling Chronomat 36 K103801A1C1K1 features a lug width of 18 mm, measured internally between the two lugs at the point closest to the caseback. Any strap with an 18 mm attachment is dimensionally compatible, provided the strap end is sufficiently flexible to conform to the slight downward curvature of the original lugs.

For the yellow gold Chronomat 36, alligator straps with vegetable tanning in cognac or tobacco tones are particularly well-suited, as they develop a patina that complements the warmth of the gold. Hand-stained black calfskin or burgundy shell cordovan offer strong contrast and character. The lug width is 18 mm; a pre-curved strap end is recommended to match the lug geometry.

To replace the strap on the Chronomat 36, use a fine-tipped spring bar tool. Insert the tip into the lateral slot of the lug, compress the spring bar, and release one side at a time. Take care not to scratch the yellow gold case: it is advisable to protect the surfaces with low-tack masking tape during the procedure.

Yes. Any aftermarket strap with an 18 mm attachment is dimensionally compatible with the Chronomat 36 K103801A1C1K1. Milano Straps offers a curated selection of handcrafted straps in various materials, available online in the 18 mm section. For specific curvature or material requirements, the Casati Milano atelier produces fully bespoke straps to order.

The lifespan of a leather strap depends on the material, frequency of wear, and exposure to perspiration and moisture. A quality alligator strap with vegetable tanning, properly cared for and rotated regularly, can last between 3 and 7 years while retaining its structural and aesthetic integrity. Shell cordovan is among the most durable options. Avoid prolonged water exposure and apply a leather conditioner every six months.