Piaget Tonneau 9691 – Onyx Elegance in 18k Gold

Pure minimalism, sculpted in gold.

This rare 1970s Piaget 9691 showcases the maison’s mastery of proportion, materials, and design. Its slim tonneau-shaped 18k yellow gold case frames a flawless onyx dial — untouched, mirror-black, and free of any markers to distract from its purity.

Inside, the revolutionary Piaget Caliber 9P — just 2mm thin — allows for this ultra-sleek profile, making it one of the most elegant hard stone watches of its era. Complemented by its original black Piaget leather strap and matching 18k Piaget buckle, this piece blends architectural design with natural beauty.

From the sapphire cabochon crown to the crisp case lines, this Piaget is an icon of 1970s luxury minimalism — for collectors who value quiet confidence and timeless craftsmanship.

- wrist size in our picture is 18cm circumference -

DIAL:

• original never touched Onyx dial in flawless condition
• original hands & crown with blue sapphire cabochon

STRAP & BUCKLE:

• original Piaget black leather strap fitting up to 18 cm wrist size / 1.5 mm thick
  
• original 18k yellow gold Piaget buckle

CASE:

• great overall condition, showing minor traces of use
• 3-body 18k yellow gold case with screw-down case back
• 24 mm (without crown) / 29 mm (lug-to-lug) / 15 mm (between lugs) / 4.6 mm thick
• year: 1970s
• reference.: 9691
• total weight: 26 g

MOVEMENT:

• Piaget Cal. 9P - manual wind
  
• 17 jewels, 18000 A/h, 52 hours power reserve
• professionally serviced 05/2025
• -9 sec/d / 250°

BOX & PAPERS:

• original Piaget hangtag
• GOLDAMMER certificate of authenticity & service documentation card
• GOLDAMMER box

GOLDAMMER REFERENCE: #993