Oris · Classic

Strap for Oris Classic 01 733 7578 4831

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width18 mm
Case diameter37 mm
Reference01 733 7578 4831
FamilyClassic
MovementOris caliber Oris 733 hours, minutes, seconds | date

Spring bar

Swiss Standard universal spring bars

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

Straps for the Classic 01 733 7578 4831

Selected for the 18 mm lug width

All 18 mm straps →

The Classic 01 733 7578 4831, seen from the bench

The Oris Classic features the automatic caliber 733 with hours, minutes, seconds, and date indications. The stainless steel case measures 37mm in diameter with 18mm lugs. The movement offers the essential functions for daily use with the robustness typical of Swiss manufacturing.

Frequently asked questions

What is the exact lug width of the Oris Classic 01 733 7578 4831?

The Oris Classic 01 733 7578 4831 is equipped with an 18-millimetre lug width. This measurement is standard for the model's lug width and must be verified in the internal space between the two lugs of the case before purchasing a replacement strap. Any strap with a 18mm lug width will be perfectly compatible with this case.

What type of strap is most suitable for the Oris Classic 01 733 7578 4831?

The Classic 01 733 7578 4831 pairs ideally with straps in fine leather, particularly Tuscan calf with vegetable tanning which enhances the case's sobriety. Smoked alligator delivers marked formal elegance, whilst a heavy canvas NATO strap keeps the model anchored to its classic-sporting character. Rubber remains the best choice for those seeking versatility across different contexts.

How do I replace the strap on my Oris Classic 01 733 7578 4831?

To replace the strap, you must remove the spring bars from the case lugs. Use a spring bar removal tool, positioning it beneath the bar, then lever gently downward until the bar is freed from its housing. Once the old strap is removed, thread the new 18mm strap's spring bars through its slots and reinsert them into the case lugs. A skilled artisan will execute this operation with precision and care.

Can I use an aftermarket strap on the Oris Classic 01 733 7578 4831 case?

Absolutely. Any strap with an 18-millimetre lug width is compatible with your watch. Bespoke artisanal straps of superior quality offer added value compared to industrial alternatives: greater thickness, precise finishing, carefully selected leather and mindful construction that will extend the strap's lifespan for many years.

How long does a natural leather strap last on the Oris Classic 01 733 7578 4831?

A high-quality leather strap, subjected to vegetable tanning, has an average lifespan of 3 to 5 years with daily wear. Longevity depends on usage intensity, climatic conditions and the care you dedicate to it. Leather treated with natural waxes and submitted to occasional conditioning can exceed this period. The advantage of natural leather lies in the ability to replace the strap without replacing the watch, indefinitely extending your Classic's life.

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