Oris · Divers 65

Strap for Divers Sixty-Five 42 Stainless Steel / Blue / NATO

The Divers Sixty-Five 42 Stainless Steel / Blue / NATO takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Not sure about the right strap, or can't find your watch?Message me on WhatsApp
Lug width21 mm
Case diameter42 mm
Reference01 733 7720 4055-07 5 21 29FC
FamilyDivers 65
MovementOris caliber Oris 733 Hours, Minutes, Seconds | Date
Year2017 - 2021
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 Divers 65 01 733 7720 4055-07 5 21 29FC

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Divers 65 01 733 7720 4055-07 5 21 29FC, seen from the bench

The Oris Divers Sixty-Five 42 Stainless Steel is a professional dive watch referencing the original 1965 model. It features a 42 mm 316L stainless steel case with unidirectional ceramic bezel and 300 meter water resistance. The Oris 733 caliber, derived from the ETA 2824-2, provides hours, minutes, seconds and date functions. The 21 mm lug width accommodates larger wrists typical of professional divers and ensures compatibility with properly sized straps.

Frequently asked questions

What is the exact lug width of the Oris Divers 65 01 733 7720 4055-07 5 21 29FC?

The lug width is precisely 21 millimetres. This measurement represents the distance between the two case lugs where the strap is fitted. It is a specific width reserved for Divers 65 models with 42mm cases and is not compatible with standard 20mm or 22mm straps.

Which strap type is most appropriate for the Divers 65 01 733 7720 4055-07 5 21 29FC?

It depends on your intended use. For daily elegance, we recommend alligator or vegetable-tanned calf leather in burgundy, brown, or black. To preserve its authentic diving vocation, a rubber Tropic strap or canvas NATO ensures practicality and durability in humid environments. A steel deployante offers convenience and modularity.

How do I change the strap on the Oris Divers 65 01 733 7720 4055-07 5 21 29FC without damaging the case?

Use a dedicated spring bar tool: insert the thin tip underneath the spring bar from above, apply downward pressure until the bar emerges from the lower lug. Repeat on the opposite lug. During reassembly, ensure the bar traverses both lugs completely, avoiding excessive pressure that could deform the edges.

Are aftermarket 21mm straps truly compatible with the Divers 65 01 733 7720 4055-07 5 21 29FC?

Yes, completely. All straps with 21mm lug width fit perfectly onto the case lugs. Compatibility is guaranteed by the technical specification, regardless of strap brand. Milano Straps offers handcrafted 21mm straps in Italian leather, rubber, and NATO, selected for construction quality.

How long does a natural leather strap last on the Divers 65?

A high-quality leather strap, under moderate use, lasts 2-4 years. Durability depends on tanning: vegetable tanning ages nobly, enriching colour and patina, but remains more fragile in very humid environments. For frequent wet situations, rubber Tropic or NATO significantly extends the operational lifespan of the strap.

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