PIAGET Ultra-Thin Wristwatch, Ref. 931 C4, 18K White Gold, Caliber 9P, 1963

Heritage

Manufactured in 1963 — serial number 93914 — this Piaget reference 931 C4 is a rare survivor from the Maison's most celebrated era. Piaget's ultra-thin movement program, launched with the legendary Caliber 9P in 1957, established the house as a pioneer of haute horlogerie and redefined what a luxury wristwatch could be. Many 18K gold watches from this period were melted during historic gold price spikes, making surviving examples with sharp hobnail definition and original serial markings increasingly scarce and highly prized by serious collectors.

Design

Powered by Piaget's celebrated ultra-thin Caliber 9P movement, this refined wristwatch reflects the Maison's longstanding mastery of elegant mechanical watchmaking. The 18K white gold case and integrated bracelet are dressed in the signature Clous de Paris hobnail texture — a hallmark of Piaget's refined mid-century craftsmanship. Its restrained design and exceptional execution exemplify Piaget's pursuit of technical innovation paired with timeless sophistication, offering collectors a distinguished dress watch from one of Switzerland's most respected manufactures.

Collector's Note

Representative of Piaget's enduring contribution to ultra-thin watchmaking, this example is a distinguished addition to any serious collection. Early Caliber 9P references in 18K white gold with intact hobnail finish are among the most desirable mid-century dress watches on the market, consistently attracting collectors who value provenance, rarity, and mechanical artistry in equal measure.

Watch Specifications

Designer: Piaget
Model: Ultra-Thin Wristwatch
Reference: 931 C4
Serial: 93914
Year: 1963
Case Material: Solid 18K White Gold
Case Weight: 75 grams
Movement: Piaget Caliber 9P (Manual Wind, Ultra-Thin at 2mm)
Dial: Silver sunray with stick markers
Finish: Clous de Paris hobnail
Color: White Gold / Silver
Origin: Made in Switzerland
Gender: Unisex
Condition: Excellent
Authenticity: Independently verified before listing

Measurements

Case Width: 23mm
Case Length: 28mm
Watch Face Width: 1 inch
Fits wrists up to approximately 8.25 inches

Included With Purchase

No original collateral included.

Photography & Representation

Every effort has been made to accurately represent this item through high-resolution photography and detailed cataloging. The photographs form part of the lot description and should be reviewed carefully, as they depict the item's condition, characteristics, and included accessories. Additional photographs are available upon request.

Authenticity Guarantee

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