Strap for Artelier Chronometer Date 40.5 Stainless Steel / Silver

The lug width of this model is 21mm. This is a specific measurement calculated by Oris to suit the proportions of this 40.50mm case. An incorrectly sized strap will not insert properly into the metal lugs, compromising the wearing experience. Always measure perpendicularly across the diameter of the spring bar, from inside to inside of the case lugs.

The choice depends on your usage context and aesthetic preference. A calf leather strap with vegetable tanning offers versatility and natural patina development over time. For absolute refinement, crocodile leather with natural aging complements the case elegantly. A cotton-polyamide NATO maintains the minimalist aesthetic with sporting practicality. FKM (Viton) rubber is recommended only for extreme conditions. Milano Straps offers all options in 21mm.

The strap is changed manually without special tools. Locate the two horizontal metal bars (spring bars) that connect the strap to the lugs. Apply gentle downward pressure on the strap itself to disengage the spring bar from the first side, then repeat on the other side. Insert the new strap into the lugs, ensuring both spring bars click firmly into place. The operation requires patience and a clean work surface.

Absolutely. Many quality aftermarket straps, including artisanal designs, are available in 21mm and offer certified compatibility with your Oris. Always verify that the strap is specified for 21mm lug width and that the material (leather, rubber, fabric) matches your aesthetic expectations. Artisanal straps in vegetable-tanned leather or shell cordovan often offer superior personalisation compared to the original bracelet.

A quality leather strap, with vegetable tanning and noble materials, lasts 3-5 years in daily use, depending on climate and maintenance. Leather ages rather than deteriorates: it develops patina, softens, and gains character. Crocodile leather lasts longer (5-7 years) due to construction density. FKM rubber resists 8-10 years. Periodic strap replacements every 2-3 years keep your watch in optimal condition, transforming it into a living and deeply personal artefact.