Strap for 1815 Tourbillon Platinum / Enamel

The lug width of the A. Lange & Söhne 1815 730.079 is 20.00 mm. This measurement is consistent across all references 730.079, 730079, and 730.079F. It is essential to verify this distance between the lugs before purchasing an aftermarket strap to ensure geometric compatibility and prevent unwanted lateral movement.

For the 730.079 in platinum, we recommend alligator in black or dark brown, as the natural texture of the leather harmonises with the minimalist aesthetic of the dial. Shell cordovan is ideal for those who appreciate chromatic evolution over time, whilst vegetable-tanned calf offers seasonal versatility. A deployante clasp is highly recommended for secure and micrometric fastening.

Replace the strap using a spring bar tool (a small bifurcated screwdriver-like instrument). Insert the tip into the lateral hole of the lug, gently press to compress the internal spring, then slide the metal bar (spring bar) inward on the case to release the pin. Repeat on the opposite side. Install the new strap by reversing this process, ensuring both pins of the spring bar click securely into their seats.

Yes. Any strap with a 20 mm lug width is mechanically compatible. However, to maintain aesthetic coherence with the platinum case and displayed movement, we recommend straps crafted from noble leathers (alligator, cordovan) with refined finishings. Casati Milano produces bespoke artisanal straps, while pre-made solutions in various finishes and colours are available online.

A high-quality leather strap, with vegetable tanning or shell cordovan, maintains structural integrity for 5–8 years with regular wear and ordinary maintenance. The aesthetic aspect evolves positively (natural patina), but the leather tends to darken and stiffen over time. Prolonged exposure to moisture and heat accelerates the ageing process. Straps manufactured by Casati Milano include an 18-month warranty against manufacturing defects, independent of natural wear.