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Mass-produced#2 in familyOfficial press photos

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Mid-tier supplier movement · caliber Oris Cal. 733: Sellita SW200-1 base, Oris-finished, 28,800bph, 38h PR, 26j; used in Divers 65 and Aquis Date; Oris rotor and decoration · 38h power reserve

Also uses Oris Cal. 733

Oris Divers Sixty-Five 40mm Ref. 01 733 7707 4035-07 5 20 89, blue dial, steel case
Oris
Divers Sixty-Five
Oris Aquis Date 41.5mm Ref. 01 733 7766 4135-07 8 22 05PEB, blue dial, steel case
Oris
Aquis
Oris Aquis Date 36.5mm Ref. 01 733 7770 4135-07 8 18 05P, blue dial, steel case
Oris
Aquis
Small case: suits slender wrists (under 6.5 in / 16.5 cm)
36 mm case. A compact, elegant wear. Particularly at home on narrower wrists where larger cases can overhang.

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Authentication

The bidirectional bezel is period-correct and intentional; buyers expecting a modern safety bezel must know this.

Known issues in the market
  • Bidirectional bezel is intentional for the 1960s design; this is not a defect.
  • Cushion lug profile is specific to the Sixty-Five design; generic lugs indicate a fake.
AreaWhat to checkWhat is correctRed flag
caseBidirectional bezelBidirectional bezel operation; period-correct for 1960s dive watch designUnidirectional bezel replaced the original bidirectional unit; incorrect for this reference
caseCushion lug profileVintage-style cushion lug profile specific to Divers Sixty-Five designGeneric or non-cushion lug profile; does not match documented case shape
casebackCal. 733 designationOris Cal. 733; Sellita SW200-1 base with Oris finishingNon-Oris caliber; incorrect caliber for this reference
Common legitimate replacements
  • Rubber or leather strap; both factory options.
  • Crystal; domed sapphire must maintain vintage profile.
Expert resources: Oris Divers Sixty-Five 36mm press materials. Oris Cal. 733 service documentation.

Authentication guide

Last reviewed June 2026

Oris Divers Sixty-Five 36mm (ref. 01 733 7747 4063-07 5 17 18), Cal. 733 on a Sellita SW200-1 base. Smaller variant of the Divers Sixty-Five. Same retro case profile; 100m water resistance.

Known reproduction risks

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MEDIUM

The Divers 65 36mm is reproduced at similar fidelity to the 40mm. The case profile and crystal dome are the two most reliable checkpoints.

  • Reproduction lugs lack the cigarette curve; they appear more angular
  • Crystal dome on reproductions is frequently too shallow
  • Bezel insert graduation spacing on reproductions is inconsistent

Dial variants by era

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EraDescriptionIdentifiers
2018 to presentOngoing production. Domed sapphire crystal. Aluminum bezel insert. Cigarette lug profile at reduced 36mm diameter.
  • 36mm case diameter
  • Domed sapphire crystal
  • Aluminum bezel insert with 60-minute scale
  • Broad dauphine hands with lume
  • Oris "Divers Sixty-Five" text at 6 o'clock

Service part flags

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Crystal

Original: Domed sapphire. The dome profile is the dominant visual feature of the Divers 65 line.

Replacement tells
  • Flat replacement crystal eliminates the distinctive profile
  • Acrylic substitution shows surface scratching under magnification

Case back markings

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2018 to present
  • "ORIS" and "DIVERS SIXTY-FIVE" on caseback
  • Reference and serial number
  • Six-screw solid caseback
  • "SWISS MADE" and water resistance rating

Movement tells

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  • Cal. 733 on Sellita SW200-1 base. Oris-signed rotor. 28,800 bph, 38-hour power reserve.
  • The 36mm case is compatible with the same movement as the 40mm. A movement running at a different beat rate indicates a swap.
Sources: Monochrome Watches — Oris Divers Sixty-Five; Oris official — Divers Sixty-Five.

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