Strap for Chronographs Seattle / Stainless Steel / Silver

The Laco Chronographs 861918 features 20-millimetre lugs. This is the standard construction specification for the model and is the essential measurement for selecting a compatible aftermarket strap. Measurement is taken from the centre of the first lug pin to the centre of the second lug pin, measured internally.

There is no single 'best' strap in absolute terms, but rather a choice dependent on context of use and personal aesthetics. For formal wear, a vegetable-tanned calf leather in dark brown or polished black enhances the chronograph's purity of design. For daily sporting use, a grey NATO or black FKM rubber strap ensures practicality without compromise. A burgundy shell cordovan represents the most refined middle ground for those seeking both aesthetics and durability in everyday use.

Strap changing is straightforward: a dedicated tool (spring bar tool) is required to compress the small springs that secure the lugs. Insert the tool into one of the small lateral holes of the spring, compress, and the pin releases. Once the old strap is removed, insert the new one by clicking the pins into the new passants. If you are not practised, Casati Milano offers a strap-change service by appointment at the bespoke atelier.

Yes, provided the strap is certified for 20mm lug width. Quality artisan straps are constructed with lugs and passants sized precisely to specification, guaranteeing both mechanical and aesthetic compatibility. Always verify the lug width specification before ordering. All straps from milanostraps.it are constructed to this measurement and ready for installation.

The lifespan of a leather strap depends on use and tanning method. Quality vegetable-tanned leather, with moderate wear (5–6 days per week), typically yields 3–5 years before replacement is needed. Shell cordovan, owing to its natural density, can last 5–7 years. Factors that reduce lifespan include excessive moisture, constant direct sunlight exposure, and frequent perspiration. Periodic maintenance (leather conditioner treatment every 12–18 months) significantly extends useful life.