Strap for Big Crown Pointer Date 40 Stainless Steel - Rose Gold / Silver

The lug width of the Oris Big Crown 01 754 7696 4361-07 5 20 52 is 20 millimetres. This measurement is standard across the model, meaning any replacement strap must be specifically designed for 20mm lugs. The 40mm case diameter requires this precise proportion to maintain aesthetic balance and wrist comfort.

The ideal strap depends on your intended use. For authentic avionic heritage, black rubber maintains original character—waterproof and inherently resilient. For refined daily wear, vegetable-tanned alligator develops patina naturally over years. A grey or sand NATO offers tactical versatility and tool-free changes. Atelier Casati Milano recommends wearing the strap on your wrist for 48 hours before final commitment.

Strap replacement requires two tools: a spring bar tool (small lever) and a soft work surface to prevent case scratching. Insert the lever into the small aperture beneath each lug, compressing the internal spring mechanism, then gently extract the old strap. Align the new strap with the lugs and firmly push the spring bar into the opposite aperture until you hear a definitive click. If you prefer professional assistance, Atelier Casati Milano performs changes by appointment with millimetre precision.

Yes, any strap with a 20mm lug width is mechanically compatible with the 01 754 7696 4361-07 5 20 52. However, mechanical compatibility does not guarantee aesthetic proportion: a 40mm brushed steel case requires straps of matching build quality, with precise stitching and noble materials. Atelier Casati Milano's hand-sewn straps use European leather, ensuring visual fidelity and decade-spanning durability.

A quality leather strap (alligator or calf) typically lasts 3–5 years of daily wear, developing attractive patina and fine micro-creasing over time. Longevity depends on climate (humidity accelerates wear), frequency of use, and tanning method (vegetable tanning ages more gracefully than synthetic). Black rubber straps remain aesthetically unchanged for 5–7 years. Atelier Casati Milano offers reconditioning services: polishing, addressing deep creases, and adding custom loops to extend your favourite strap's lifespan.