Strap for Oris Big Crown 01 754 7679 4031

The Oris Big Crown 01 754 7679 4031 features a 20mm lug width. This measurement represents the distance between the two horizontal spring bar attachment points on the case and determines which straps are compatible. To verify it yourself, use a digital calliper to measure the internal space between the lugs at the 12 and 6 o'clock positions. All our 20mm straps fit perfectly on this model without requiring any modifications.

The choice depends on your intended use and aesthetic preference. For a classic aviator approach, we recommend a vegetable-tanned calf leather strap in dark brown—this choice honours the model's heritage. If you prefer a more tactical and reversible aesthetic, a nato strap in military green creates a direct visual reference to historical flight jackets. For maximum functionality and water resistance, vulcanised rubber provides robustness without compromise. Every option preserves the tool-watch identity of the Big Crown whilst respecting its character.

The procedure is straightforward and requires no specialist skills. Locate the two horizontal spring bars (typically positioned at the 3 and 9 o'clock positions on the case flanks). Using a spring bar removal tool—a small implement with pointed ends—apply gentle pressure to the pin holding the strap. The spring bar will release from its seat and you can remove the old strap. Reverse the process to install the new one, sliding the pin through the lug holes of the new strap until it locks into position. If you lack experience, a professional watchmaker can perform this operation in minutes at minimal cost.

Yes, provided the lug width matches 20mm. Straps are universal components and international standards guarantee interoperability between different brands as long as the lug measurement coincides. A bespoke, quality strap manufactured for 20mm will fit your Big Crown without functional or aesthetic differences compared to an official Oris accessory. Compatibility depends solely on geometry, not the strap brand.

A leather strap's lifespan varies according to the tanning method, daily wear intensity, and maintenance practices. A quality vegetable-tanned leather strap retains functionality for 3–5 years of regular use whilst developing a beautiful patina over time. If exposed constantly to moisture, perspiration, or extreme heat, wear accelerates (18–24 months). Shell cordovan, being denser and more resinous, resists degradation for 7–8 years. NATO and rubber straps offer greater longevity (10+ years) owing to their synthetic durability. Regular maintenance—cleaning with a damp cloth, conditioning with neutral wax—significantly extends strap lifespan.