1963 Piaget Ultra-Thin 18K White Gold Watch – Reference 931 C4 | Caliber 9P

1963 Piaget Ultra-Thin — From the Maison's Golden Era.

An increasingly rare survivor featuring Piaget's iconic 18K white gold Clous de Paris hobnail finish.

The Heritage

Manufactured in 1963 (Serial 93914), this Piaget reference 931 C4 represents the maison's celebrated ultra-thin era. The 18K white gold case and integrated bracelet feature the signature Clous de Paris hobnail texture, a hallmark of Piaget's refined mid-century craftsmanship.

The Movement

Inside is the legendary Piaget Caliber 9P, introduced in 1957 and measuring just 2mm thick. This groundbreaking movement established Piaget as a pioneer of ultra-thin luxury watches.

Collector's Note

Many gold watches from this era were melted during historic gold price spikes, making surviving examples increasingly scarce. Pieces retaining sharp hobnail definition and original serial markings are especially desirable to collectors.

Technical Specifications

• Reference: 931 C4
• Year: 1963 (Serial 93914)
• Case: Solid 18K White Gold, 75g
• Movement: Piaget Caliber 9P (Manual Wind, Ultra-Thin at 2mm)
• Dial: Silver Sunray with Stick Markers
• Condition: Excellent

Measurements

• Width: 23mm
• Length: 28mm

Authenticity

Every piece is independently verified before listing — no exceptions.

Piaget is a registered trademark of Piaget. AUTHENTIQUE LUX is not affiliated with Piaget.