Roger Dubuis
Excalibur 36 Automatic Skeleton
Ref. RDDBEX0967
2019–present · 36mm · caliber Roger Dubuis Cal. RD821: in-house automatic skeleton, 28,800bph, 60h PR; petal-cut openwork through the full movement; Geneva Seal certified
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Movement tier: unclassified
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 Geneva Seal guarantees hand-done finishing on every component; verify Geneva stripes and beveled edges on the RD821 movement under a loupe.
Known issues in the market
- The Geneva Seal requires re-certification after each service; any Excalibur without current papers may have had an uncertified service.
- Petal-cut skeletonized architecture must show Geneva stripes and beveling under a loupe; machine-regular finishing is non-compliant.
| Area | What to check | What is correct | Red flag |
|---|---|---|---|
| movement | Geneva Seal finishing on RD821 movement | Hand-done Geneva stripes and beveled edges visible on movement components under a loupe | Machine-regular or unfinished surfaces; Seal standards not met or non-genuine movement |
| dial | Skeletonized petal-cut architecture | Petal-cut skeletonized bridges visible through the dial | Non-petal or non-skeletonized architecture; wrong model or non-genuine |
| caseback | Roger Dubuis serial and Geneva Seal hallmark | Serial, reference, and Geneva Seal hallmark correctly applied | Missing Geneva Seal hallmark on caseback or papers; uncertified or non-genuine |
| case | Double-crown case profile | Excalibur 36 double-crown case architecture consistent with RDDBEX0967 | Single-crown or incorrect case profile; wrong model |
Common legitimate replacements
- Strap; Roger Dubuis OEM rubber/leather only.
- Crystal; sapphire standard.
Expert resources: Roger Dubuis authorized service; Geneva Seal certification documentation.
Authentication guide
Last reviewed June 2026
The Excalibur 36 brings the skeleton automatic format into a 36mm case with the Geneva Seal-certified RD821 caliber. Authentication follows the same Geneva Seal finishing check as the larger Excalibur pieces.
