Strap for Classic Date 37 Stainless Steel - Rose Gold / Silver

The lug width (ansa width) of the Oris Classic 01 733 7578 4351-07 5 18 10 is 18 millimetres. This measurement is taken perpendicularly from one lug end to the other, excluding the internal passant where the strap rests on the case. The 18 mm width is standard on this reference and grants access to a comprehensive catalogue of compatible artisanal and aftermarket straps.

The optimal strap depends on intended use. For formal elegance, we recommend alligator with vegetable tanning or havana shell cordovan in deep brown, both developing natural patina that harmonises with the stainless steel case. For daily versatility, vegetable-tanned calf in scotch grain or smooth finish offers comfort and adaptability. For sporting contexts, navy NATO or FKM rubber maintain the proportional balance of the 37 mm case without adding visual weight.

The strap is changed by removing the spring bars—the small metal pins securing the strap to the lugs. Use a spring bar tool or fine-pointed implement to press the bar ends towards the centre, freeing the existing strap. Insert the new strap by aligning the holes with the lugs and ensuring the spring bars lock firmly into their seats. Verify secure attachment on both sides before wearing the watch.

Any strap with an 18 mm lug width is compatible with the Oris Classic 01 733 7578 4351-07 5 18 10. On milanostraps.it you will find artisanal straps in alligator, calf leather, shell cordovan, NATO weave, and FKM rubber—all available in 18 mm width and customisable by colour, texture, and buckle type (classically pinned or deployante in stainless steel).

Leather strap longevity depends on material quality and frequency of wear. Premium calf leather with vegetable tanning typically lasts 3–5 years of daily use, developing character and patina. Shell cordovan, being denser and more durable, can endure 5–8 years or longer. Alligator with vegetable tanning maintains excellent suppleness for 4–6 years. Durability extends significantly if the strap is rotated with other options, allowing leather to dry and rest between wearings.