Technical Archive

Oris
Big Crown 01 754 7741 4315-Set— lug 20mm

Oris Big Crown 01 754 7741 4315-Set: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Big Crown Pointer Date 40 Stainless Steel - Bronze / NZZ Edition

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Oris 01 754 7741 4315-Set
Lug Width
20 mm

The essential strap measurement.

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Reference

01 754 7741 4315-Set

Movement

Oris caliber Oris 754 Hours, Minutes, Seconds | Date

The Heritage

The Oris Big Crown represents a modern reissue of the brand's classic aviator watches. It features the Oris 754 caliber with hour, minute, second, and date functions. The model has 20mm lugs and maintains the typical aesthetic of aviation instruments with a large crown.

FAQ

What is the lug width of the Oris Big Crown 01 754 7741 4315-Set?

The lug width of the Oris Big Crown 01 754 7741 4315-Set is 20mm. This specification is critical for selecting compatible straps. Measure carefully from top to bottom lug, accounting for internal spacing. A tolerance of ±0.5mm is acceptable, though 20mm is the official specification.

Which strap is best suited to the Oris Big Crown 01 754 7741 4315-Set?

Selection depends on intended use. Alligator leather with vegetable tanning complements the bronze case and develops patina over time. Calf leather with vegetable tanning offers formal elegance and durability. NATO straps provide chromatic versatility and sporty robustness. FKM rubber is ideal for aquatic environments or humid conditions. All are available in 20mm width.

How do I change the strap on the Oris Big Crown 01 754 7741 4315-Set?

Strap replacement requires a springbar tool (lever for removing elastic pins). Insert the flat tip beneath the lug, applying gentle upward pressure to compress the spring, then extract the pin. Repeat on the opposite side. Align the new 20mm strap with the lugs and reinsert pins until you hear a click confirming closure. If uncertain, consult a specialist.

Can I use third-party compatible straps on this reference?

Absolutely. The 20mm lug width is standard, ensuring compatibility with any third-party strap of identical width. Artisan straps crafted from premium materials—alligator, vegetable-tanned calf, pull-up leather—fit perfectly and often enhance wearing comfort compared to original factory straps.

What is the average lifespan of a leather strap for this watch?

A quality leather strap with vegetable tanning resists 2-4 years under moderate daily wear. Factors affecting longevity include frequency of use, direct sun exposure, environmental humidity, and personal perspiration. Alligator straps reveal elegant, progressive wear and often exceed 5 years. NATO and rubber straps offer lifespan of 5-7+ years owing to material resilience.