PIAGET LADY'S WRISTWATCH In yellow gold, partially set with diamonds and emeralds, the oval dial applied with opals. Twisted yellow gold bracelet with attachments set with diamonds and calibrated emeralds on a signed folding clasp. Sapphire crystal. Circa 1980. Hand-wound mechanical movement (calibre 4P1). Reference: 4566 E 21. Serial number: 364321. A diamond, opal and 18k gold lady's wristwatch, mechanical movement, by Piaget. Circa 1980. RC : Length: 18 cm. Gross weight: 30.8 g (18k - 750).