18K Piaget Hexagonal Onyx/Diamond Watch

Our Perspective:

Piaget’s legacy of ultra-thin watchmaking and refined use of stone dials is on full display in this elegant 1970s piece. Featuring a striking factory onyx dial accented by natural diamonds, it delivers a bold contrast that feels both sophisticated and luxurious. The slim 18K white gold case, measuring just 5mm thick, showcases the brand’s technical mastery while maintaining a delicate, jewelry-like presence on the wrist.

Powered by the famous manual-winding Piaget Caliber 9P2, this watch pairs mechanical pedigree with timeless design. Its integrated 18K white gold bracelet and original foldover clasp create a seamless, cohesive silhouette, enhancing its overall elegance. Sized at 29mm by 23.5mm and suited for smaller wrists, it’s a beautifully preserved example of Piaget’s golden-era craftsmanship- where fine watchmaking meets high jewelry.

Condition Report:

Case: Watch was likely polished in its lifetime, but retains deep engravings/hallmarks on caseback and a sharp case. Medium scratches and small dings throughout case.

Bracelet: Integrated 18K white gold bracelet fits a maximum wrist size between 5.75" and 6". Very good condition with only light scratches. Clasp shows medium scratches and wear and is signed Piaget 750.

Dial: Original Piaget onyx and diamond dial. Dial and hands are in near perfect condition- onyx shows no chips or cracks. Crystal may have light wear under magnification.

Movement: Piaget Cal. 9P2 is in beautiful aesthetic condition and running well with a 5-position average of +4.7 S/D | 277° AMP | 0.3MS BE. 

Delivered as watch only, no box or papers.

Condition Grade: 8.75/10