Oris · Flight Timer

Strap for Oris Flight Timer 01 635 7568 4064

Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width21 mm
Case diameter42 mm
Reference01 635 7568 4064
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

Straps for the Flight Timer 01 635 7568 4064

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Flight Timer 01 635 7568 4064, seen from the bench

The Flight Timer features the Oris 635 caliber with functions for hours, minutes, seconds, date and day of the week. The stainless steel case measures 42mm in diameter with 21mm lugs. The model belongs to the brand's aviation collection.

Frequently asked questions

What is the lug width of the Oris Flight Timer 01 635 7568 4064?

The lug width is 21mm. This measurement represents the space between the two lugs of the Oris case. To verify correctly, place a ruler perpendicular to the case, measuring the internal distance between one lug and the other. The 21mm specification ensures perfect compatibility with all artisanal straps in our dedicated collection.

Which strap is most suitable for the Flight Timer?

For the Flight Timer, we recommend black or dark brown alligator, which enhances the instrumental cockpit aesthetic. Alternatively, vegetable-tanned calf leather in caramel brown offers natural patina and progressive ageing. NATO and technical rubber straps maintain pure aviatory character, ideal for humid climates and intensive use. The choice depends on purpose: formal vs. sporty.

How do you change the strap on an Oris Flight Timer?

The strap is replaced by removing the spring bars that connect the strap to the lugs. Use a dedicated removal tool or a small flat screwdriver to push the bar towards the centre and detach it. Once both lugs are free, insert the new strap by aligning its holes with the spring bars, then press until they click into place. The operation takes 2-3 minutes.

Is it possible to use a compatible aftermarket strap on the Flight Timer 01 635 7568 4064?

Yes, absolutely. The Flight Timer accepts any artisanal strap with 21mm lug width. Aftermarket straps offer advantages: superior material choice (alligator, shell cordovan, vegetable calf), customisation options (colours, finishes, thickness), and lower costs than Oris OEM straps. Italian artisanal quality guarantees durability and finishes on par with the luxury segment.

How long does a leather strap last on a watch like the Flight Timer?

A quality leather strap (alligator, vegetable calf, shell cordovan) typically lasts 3-5 years with daily use, up to 7-8 years with rotation between multiple straps. Longevity depends on climate (humidity and heat accelerate wear), frequency of use, and care. Vegetable-tanned straps develop natural patina and remain functional even beyond 5 years, only changing in aesthetic appearance. Technical rubber resists 4-6 years in marine environments. Regular maintenance (cleaning, conditioning) extends useful 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