Ultra rare vintage Audemars Piguet ref 5556 Chronograph manufactured in 1981,Calibre 5030 engraved gilt-finished, skeletonized dial, baton numerals on outer chapter ring, two sub-dials indicating small seconds and 30 minutes register on champagne chapter rings, circular case 37mm diameter in 18k gold, rope-twist decorated band, similarly decorated 18k gold integral bracelet.