Omega · De Ville

Strap for De Ville Co-Axial 41 Chronoscope Stainless Steel / Black

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

Lug width

20mm

20 mm straps All Omega

Lug width20 mm

Case diameter41 mm

Reference4850.50.31 (aka: 48505031)

FamilyDe Ville

MovementOmega caliber 3313 hours, minutes, small seconds | date | Chronograph, column wheel | co-Axial escapement

CaseStainless Steel

Recommended spring bar

Spring bars Omega 20mm — 1.8mm diameter

Technical match for lug width and diameter · lug 20 mm · Ø 1.8 mm

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All Omega spring barsOpen →

Straps for the De Ville 4850.50.31 (aka: 48505031)

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The De Ville 4850.50.31 (aka: 48505031), seen from the bench

The Omega De Ville Co-Axial 41 Chronoscope (ref. 4850.50.31) is a stainless steel dress watch featuring a 41mm case and a 20mm lug width. It houses the Omega caliber 3313, a column wheel chronograph movement with Co-Axial Escapement technology that reduces friction between components. The watch features a classic dial layout with center hour and minute hands, a subdial at 6 o'clock, and an integrated date window, designed to fit comfortably under a shirt cuff.

Frequently asked questions

What is the exact lug width of the Omega De Ville 4850.50.31?

The lug width of the De Ville 4850.50.31 is 20mm. This width is standard for elegant 41mm watches and determines strap compatibility. On Milano Straps you will find all models certified for this size.

Which strap is most suitable for the Omega De Ville 4850.50.31?

Polished alligator is the traditional choice to enhance the formal elegance of the De Ville. For more versatile and casual versions, vegetable-tanned calf leather is excellent. Light silk NATOs and structured rubber represent modern alternatives while maintaining stylistic sobriety.

How do I change the strap on the De Ville 4850.50.31?

The change is made through the bayonet attachments of the case: using a dedicated tool (spring bar tool) you extract the spring bars and insert the new 20mm strap into the spaces of the metal connector. If you are not experienced, the Casati Milano atelier offers the replacement service with personalized consultation.

Can I use an aftermarket strap for the De Ville 4850.50.31?

Yes, provided it is certified for the 20mm lug width. Milano Straps are made according to compatibility standards and guaranteed for 18 months. Customization for size and finish makes each strap a unique complement for your watch.

How long does a leather strap last for this model?

A quality alligator or calf leather strap, worn daily, maintains shape and aesthetics for 3-5 years before showing signs of natural aging. With vegetable tanning, the patina increases character. Milano Straps' 18-month warranty covers manufacturing defects and ensures structural reliability.

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