Oris · Big Crown

Strap for Big Crown Diamonds 38 Stainless Steel / MOP / Bracelet

Takes 19 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width19 mm
Case diameter38 mm
Reference01 733 7649 4066-07 8 19 76
FamilyBig Crown
MovementOris caliber Oris 733 ND Hours, Minutes, Seconds
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

The Big Crown 01 733 7649 4066-07 8 19 76, seen from the bench

The Oris Big Crown is powered by the Oris 733 automatic caliber with hour, minute and second indication. The watch features 19mm lugs and reference 01 733 7649 4066-07 8 19 76. The model recalls the design of aviation watches with a large crown for adjustment with gloves.

Frequently asked questions

What is the lug width of the Oris Big Crown 01 733 7649 4066-07 8 19 76?

The lug width is 19 millimetres. This measurement refers to the internal distance between the two lugs on the case. Compatible straps must fit snugly without slack, with a tolerance of ±0.5 millimetres, ensuring secure yet gentle retention upon fitting.

Which strap is recommended for this Oris Big Crown model?

Selection depends on intended wear. For formal elegance, vegetable-tanned alligator in cognac deepens the case's vintage austerity; for sport practicality, a grey or navy NATO in polyamide provides daily versatility; for humid environments, FKM rubber in pearl grey preserves aesthetic purity without functional compromise.

How do you change the strap on a watch with 19mm lugs?

Remove the strap by inserting a flat tool (spring bar tool) between the lug and strap, gently lifting the internal spring until the pin disengages. Position the new strap by aligning its first slot with the compressed spring, then release the tool. Millimetre-level tolerance demands manual precision; MilanoStraps straps are pre-calibrated for this lug width.

Are aftermarket straps compatible with the Oris Big Crown 01 733 7649 4066-07 8 19 76?

Yes, provided nominal lug width is 19mm and construction quality is artisanal. MilanoStraps straps are calibrated for this measurement through manual inspection, guaranteeing repeatable fitting and precision conforming to horologer standards.

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

A calf leather strap with vegetable tanning, subject to moderate daily wear, lasts 18–36 months before strap loops show fatigue signs. Longevity depends on ambient humidity, wearing frequency, and sun exposure. Alligator or shell cordovan straps extend lifespan to 3–5 years due to superior fibre density.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only