Vintage 1953 Patek Philippe Calatrava 2501-1 "Disco Volante" in very good condition. Champagne dial with Roman numerals at 12,3,6 & 9 o'clock and baton style hands. Eighteen karat 33 mm yellow gold case in diameter and 7.5 mm thick. Features a fixed stepped bezel and acrylic crystal. Brown lizard skin strap with 18k yellow gold buckle.