Strap for Big Crown Pointer Date Calibre 403 Stainless Steel / Green / Bracelet

The Oris Big Crown 01 403 7799 4067-07 8 20 06 features a lug width of 20 mm. This measurement represents the distance between the two lugs (spring bar holes) where the strap attaches to the case. To verify this measurement, place a ruler in the internal seating between the upper and lower lugs: you will obtain exactly 20 mm. This dimension renders the timepiece compatible with any aftermarket strap manufactured for 20 mm lug width, offering complete freedom in customisation.

For the Big Crown 01 403 7799 4067-07 8 20 06, we recommend three strap categories according to usage: 1) Leather (alligator, calf, shell cordovan) for formal and dressy-sport contexts, which enhance the 40 mm case proportion. 2) NATO and Cordura for aviator/military use and situations requiring extreme robustness. 3) FKM rubber for nautical environments or high-humidity conditions. Each category highlights different aspects of this timepiece's functional DNA. Your choice depends on your lifestyle and the environment where you will predominantly wear it.

Changing the strap is a straightforward operation requiring no watchmaking expertise. Procure a spring bar tool (a lever instrument with two curved ends). Position the watch on a soft surface (flannel cloth). Insert the tool's tip into the seating between the lug and the spring bar, pushing gently downward to compress the internal spring. When the spring bar retracts, extract the old strap. Reverse the procedure to install the new strap: align it with both spring bars, press with the tool, and allow the spring bar to snap back into position. Verify that the strap is securely fastened before wearing the watch.

Since the Oris Big Crown 01 403 7799 4067-07 8 20 06 features a 20 mm lug width, it is compatible with any strap manufactured for this measurement. This includes: full-grain leather straps, alligator, vegetable-tanned calf, shell cordovan, NATO straps in synthetic canvas, cotton Cordura, FKM/silicone rubber straps, mesh metal bracelets, and suede leather straps. MilanoStraps offers an extensive collection of artisanally crafted models, each tested for perfect mechanical compatibility with your timepiece.

The lifespan of a leather strap depends on three primary factors: leather quality, frequency of use, and climatic environment. A high-quality strap in vegetable-tanned calf or shell cordovan, worn daily in temperate climate, lasts approximately 3–5 years before requiring replacement. If worn sporadically, the lifespan extends to 7–10 years. Humidity, extreme heat, and direct sunlight exposure shorten strap longevity. Proper maintenance (regular cleaning with a damp cloth, rapid drying after accidental water contact, conditioning every 6–12 months with specialist creams) significantly prolongs durability. Many collectors rotate multiple straps on the same watch to distribute wear and extend the overall lifespan of their collection.