Audemars Piguet. A fine and unusual 18K gold, diamond and sapphire-set self-winding perpetual calendar wristwatch with phases of the moon and bracelet

Audemars Piguet. A fine and unusual 18K gold, diamond and sapphire-set self-winding perpetual calendar wristwatch with phases of the moon and bracelet
Signed Audemars Piguet, Automatic, Quantieme Perpetuel Automatique No. 206, ref. 5597, movement no. 212705, case no. B 45977, manufactured in 1980
Cal. 2120/1 nickel-finished lever movement, 36 jewels, 21K gold rotor, the gilt dial with applied diamond-set numerals, four subsidiary dials indicating month, day, date and phases of the moon combined with lunar calendar, in circular case with diamond and baguette-cut sapphire-set bezel, the back secured by four screws, 18K gold Audemars Piguet integral woven bracelet, case, dial and movement signed
40 mm. diam.