Audemars Piguet. A Rare Yellow Gold Perpetual Calendar Keyless Open Face Watch with Moon PhasesModel/Reference: Quantieme Perpetual/5555BA, No. 110Movement No: 263824, signedCase No: B 78839Year: Circa 1981Calibre: 5020, manual windingDial: White lacquer, signed Case: 48mm, 18k yellow gold, snap on case back, signed注脚爱彼,「Quantieme Perpetual」5555BA型號，黃金萬年曆懷錶， 配月相顯示。年份約1981。