Oris · Classic

Strap for Oris Classic 01 733 7594 4891

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter42 mm
Reference01 733 7594 4891
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

The Classic 01 733 7594 4891, seen from the bench

The Oris Classic features the automatic caliber 733 with hour, minute, second, and date functions. The stainless steel case measures 42mm in diameter with 20mm lugs. The movement provides the essential time indications through an automatic self-winding mechanism.

Frequently asked questions

What is the lug width of the Oris Classic 01 733 7594 4891?

The Oris Classic 01 733 7594 4891 features a lug width of exactly 20 millimetres. This measurement is essential for selecting a compatible watch strap. You can verify it by placing a digital calliper across the attachment points of the case, parallel to the spring bar. Accurate measurement ensures proper fitment of any replacement strap.

Which strap is most suitable for the Oris Classic 01 733 7594 4891?

The choice depends on usage context and personal aesthetic preference. For formal occasions, we recommend alligator or shell cordovan leather; for versatile daily wear, vegetable-tanned calf leather that develops patina over time; for sports or warm climates, NATO textile or vulcanised rubber. The 42-millimetre case and silver dial harmonise elegantly with both warm tones (brown, hazelnut) and cool palettes (black, navy blue).

How do I change the strap on my Oris Classic 01 733 7594 4891?

You will need a spring bar tool. Position the watch on a stable surface, insert the flat tip of the tool into the lateral attachment hole of the lug, and gently lift until you feel the spring mechanism release. The spring bar will then slide out naturally. Repeat on the opposite side. To fit the new strap, align the 20-millimetre lug width holes with the steel lugs and press gently until you hear a click. Avoid sudden movements to prevent damaging the attachment mechanism.

Which aftermarket straps are compatible with the Oris Classic 01 733 7594 4891?

Any strap equipped with a 20-millimetre lug width is compatible. Your options include leather straps (vegetable-tanned, alligator, calf), NATO textiles, rubber, and even mesh bracelets. Always verify the lug width before purchase to ensure compatibility. Milano Straps offers a complete collection of 20mm straps, customisable and ready to ship, selected for aesthetic harmony and durability with watches of this calibre.

How long does a leather strap last on the Oris Classic 01 733 7594 4891?

Longevity depends on the material, daily usage, and maintenance. A vegetable-tanned Tuscan leather strap can exceed 5–7 years with moderate wear and protection from excessive moisture. Alligator leather is even more durable, lasting 8–10 years. Natural materials age gracefully: they develop patina, darken over time, and tell the story of lived experience. To extend lifespan, rotate between multiple straps, protect from direct heat sources, and occasionally apply leather-specific balms. NATO textiles and rubber can surpass 10 years if not exposed to extreme stress.

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