Oris · Classic

Strap for Classic Date 42 Stainless Steel / Silver / Bracelet

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 4091-07 8 20 61
FamilyClassic
MovementOris caliber Oris 733 hours, minutes, seconds | date
CaseStainless Steel

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 7594 4091-07 8 20 61

Selected for the 20 mm lug width

All 20 mm straps →

The Classic 01 733 7594 4091-07 8 20 61, seen from the bench

The Oris Classic 01 733 7594 4091-07 8 20 61 represents independent Swiss watchmaking heritage with a 42mm stainless steel case and 20mm lug width. Powered by the Oris 733 automatic caliber beating at 28,800 vibrations per hour with over three days power reserve, it features a date window, sapphire crystal, and 100m water resistance. The 316L stainless steel case, closure back, and classical proportions define this timepiece as a bridge between sporty and formal aesthetics.

Frequently asked questions

What is the exact lug width of the Oris Classic 01 733 7594 4091-07 8 20 61?

The lug width of this model is 20mm according to ISO 1706 standard. This measurement represents the internal distance between the two metal lugs on the case. To verify strap compatibility, measure the thickness of the spring bars or consult the technical specifications: 20mm is the precise standard for this Oris Classic reference.

Which strap is best suited for the Oris Classic 01 733 7594 4091-07 8 20 61?

To maintain the constructive dignity of this Swiss chronograph, we recommend alligator leather with vegetable tanning for natural aesthetic evolution, or black aniline calf for formal contexts. A NATO strap in high-density ballistic canvas offers versatility without compromise. Your choice depends on usage: formal elegance requires noble leathers, while sporty wear permits robust technical textiles.

How do I change the strap on the Oris Classic 01 733 7594 4091-07 8 20 61?

Use a spring bar tool to extract the attachment pins from the case lugs. Position the watch on a soft surface, then gently push the pin inward from one side until it emerges completely. Repeat on the other lug. Insert the pins into your new 20mm strap and reinsert them into the lugs until you hear the locking click.

Is an aftermarket quality strap compatible with this Oris Classic?

Absolutely, provided the lug width is respected (20mm). Artisanal straps from specialised manufacturers often offer constructive quality superior to OEM straps. Verify that the strap has been crafted on specific calibres for 20mm lugs, not as an adaptation of adjacent standard widths, to guarantee optimal comfort and retention.

How long does a leather strap last on my Oris Classic 01 733 7594 4091-07 8 20 61?

A noble leather strap with vegetable tanning, kept dry and subjected to regular care, lasts approximately 4-6 years of daily wear. Exposure to perspiration, water and UV rays accelerates aging. With careful maintenance (rapid drying, sun protection), patina becomes distinctive character. Aniline calf straps have similar lifespan but require conditioning with specific balms.

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