AUDEMARS PIGUET LADY'S PIECE UNIQUE DIAMOND & SAPPHIRE YELLOW & WHITE GOLD Audemars Piguet, Genève, "Piece Unique," case No. D46274, Ref. No. 61 78 16. Made in the 1990's. Fine and unusual, 18K white gold, yellow gold, diamond and sapphire lady's wristwatch with single hand and rendez-vous indication and an 18K yellow gold Audemars Piguet buckle. Dial, case and movement signed. Notes DIAM. 27 mm. THICKNESS 6 mm.