Oris · Flight Timer

Strap for Oris Flight Timer 01 635 7568 4061

The Oris Flight Timer 01 635 7568 4061 takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

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Lug width21 mm
Case diameter42 mm
Reference01 635 7568 4061
FamilyFlight Timer
MovementOris caliber Oris 635 Hours, Minutes, Seconds | Date, Day

Spring bar

Swiss Standard universal spring bars

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

What I'm asked about the Oris Flight Timer 01 635 7568 4061

What strap size does the Oris Flight Timer 01 635 7568 4061 take?

The Oris Flight Timer 01 635 7568 4061 needs 21 mm between the lugs, usually 18 mm at the buckle. It's the size I've been fitting on it for years.

Can the strap on the Oris Flight Timer 01 635 7568 4061 be changed?

Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.

Can I put a leather strap on the Oris Flight Timer 01 635 7568 4061?

Yes, in 21 mm leather. On a 42 mm case a calf strap works every day; if you want something more, alligator.

Which strap do you recommend for the Oris Flight Timer 01 635 7568 4061?

A 21 mm calf strap, for every day. You'll find it ready in the 21 mm collection. If you'd rather have something built on your wrist, the Casati atelier.

Straps for the Flight Timer 01 635 7568 4061

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Flight Timer 01 635 7568 4061, seen from the bench

The Flight Timer has a stainless steel case of 42mm diameter with 21mm lugs. It mounts the Oris 635 automatic caliber with indication of hours, minutes, seconds, date and day. The model is part of the aviation collection of the Swiss brand.

Frequently asked questions

Are aftermarket 21mm straps compatible with the Flight Timer 01 635 7568 4061?

Yes, all quality artisanal straps designed for 21mm lug width are fully compatible with the Flight Timer. Premium leather, alligator and NATO straps in 21mm fit perfectly onto the case's metal pins without play or forcing. Always verify the lug width is exactly 21mm before purchase to ensure proper fitment.

How long does a leather strap last on the Oris Flight Timer 01 635 7568 4061?

A vegetable-tanned leather strap typically lasts 3–5 years of daily wear, depending on sun exposure, perspiration and humidity levels. Vegetable-tanned leather develops natural patina and softens over time. An alligator strap, if properly maintained, lasts 5–7 years. Longevity increases when you rotate straps regularly, allowing the leather to breathe and maintain structural elasticity.

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.

Request an appointment →

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

The atelier's website: casatimilano.com