Strap for Heritage Chronometrie Exo Tourbillon Slim White Gold / Slate

The Montblanc Heritage Spirit Orbis Terrarum 118471 features a lug width of 20 millimetres. This technical specification is essential when selecting compatible aftermarket straps. The width-to-case diameter ratio of 1:5 ensures classical aesthetic balance.

We recommend straps in genuine alligator leather in cognac or deep brown tones, which emphasise the elegance of white gold and the formal character of the Heritage collection. Alternatively, vegetable-tanned calf leather or silk-twisted NATO straps offer daily versatility. Every choice should maintain coherence with the 18-carat white gold deployante.

The 118471 uses standard spring bars. Obtain a strap removal tool (small bar extractor), gently slide the bars from the lugs without forcing, replace the used strap with a new 20mm option, and reinsert the bars. If unfamiliar with the procedure, Casati Milano provides strap changes by appointment at the atelier.

Yes, any strap with a 20mm lug width is structurally compatible. However, we recommend selecting thicknesses between 3.5 and 4.2 millimetres to maintain ideal proportions. Milano Straps products are crafted to these specifications for maximum aesthetic comfort.

A high-quality leather strap with vegetable tanning typically lasts 3–5 years under daily use with routine care. Alligator leather, being denser, may last 7–8 years. Longevity increases significantly if rotated with other straps. Humidity and direct sunlight exposure accelerate ageing.