.Jean Deonna (Geneva, c. 1700) Museum-Quality Rarity: Baroque „Oignon” Pocket Watch

Museum-Quality Rarity: Baroque „Oignon” Pocket Watch – Jean Deonna (Geneva, c. 1700)

Quite possibly a once-in-a-lifetime opportunity on the global market. Offered here is an exceptional, monumental Baroque pocket watch crafted by the legendary Genevan master Jean Deonna (Maître Horloger) at the turn of the 18th century. Preserved in outstanding collector-grade condition, this timepiece represents an invaluable object for the most discerning connoisseurs of early horology.

Key Highlights & Value Drivers:

• World-Class Rarity: Timepieces signed by Jean Deonna are extraordinarily scarce, with known examples almost exclusively residing in museum collections or top-tier private holdings. The appearance of such a complete and impeccably preserved specimen on the open market is a landmark event.

• Documented Provenance & History: The importance of this maker and this exact watch model is formally documented in horological literature—featured alongside a photograph of its dial in Osvaldo Patrizzi’s seminal reference work, Dictionnaire des Horlogers Genevois.

• Genevan Heritage: Jean Deonna was a key figure during the Golden Age of Genevan watchmaking—a distinguished master who trained Jean-François Rousseau (c. 1700), an ancestor of the famous philosopher Jean-Jacques Rousseau.

• Monumental Presence (55 mm): The impressive 55 mm Oignon-style case gives this watch exceptional weight, prestige, and visual presence.

Technical & Artistic Specifications:

• Maker: Jean Deonna (Geneva, Switzerland)

• Period: c. 1690–1710 (Baroque)

• Diameter: 55 mm

• Case Architecture: Double/Triple-cased (Pair-cased / Oignon).

  • Inner Case: Solid polished silver housing the movement.

  • Outer Protective Case: Historical silver, masterfully embossed (repoussé) and chased with a Baroque figural scene framed by acanthus scrolls and floral motifs.

  • Presentation/Travel Case: Dedicated rimmed protective box lined with deep red velvet.

• Dial: Silver relief dial featuring an integrated Roman hour ring and an outer minute track with Arabic numerals. Centered with a sculpted cartouche bearing the master’s signature: Deonna.

• Movement:

  • Full-plate verge escapement wound from the rear via key.

  • Fire-gilded brass plates retaining their original, brilliant luster.

  • Fully signed on the top plate: J. Deonna

  • Intricately pierced and hand-carved balance cock (coq) showcasing the pinnacle of late-17th-century metal engraving.

  • Silver regulator dial with numerical indicators.

• Included: Period-correct winding key.

Summary:

More than just a watch, this is a museum-grade piece of decorative art and a blue-chip horological investment. Acquiring an original Jean Deonna in such remarkable condition is an opportunity unlikely to repeat itself for decades.