Patek Philippe, gentleman's Calatrava watch, 1977, Ref 3520/00D: white enamel dial with black Roman numerals and hands, manual movement. 18ct yellow gold case with fine hobnail bezel. Black leather band with original 18ct yellow gold Patek buckle. Dial and movement signed. Excellent working condition, case 32 mm. Original case and certificate of Identity/Warranty and retailers swing tag