An 18ct gold serpent necklace, by Elsa Peretti, for Tiffany & Co, the articulated body composed of graduated polished links, the clasp modelled as a serpent head clasping its own tail, the clasp stamped ‘© Tiffany & Co, Peretti, 750’, the tail hallmarked and bearing maker’s mark ‘T&Co’, total length 49.5cm. £1,500-£2,000