17. 17Y Patek Philippe. An 18K gold manual wind wristwatch Model: Calatrava 'Disco volante' Date: Circa 1970 Movement: Jewelled manual wind Dial: Sunburst champagne, applied gilt baton hour markers, gilt pointed baton hands Case: Brushed and polished round, snap on back Strap/Bracelet: Black alligator leather Buckle/Clasp: Signed 18K gold buckle Signed: Case, dial & movement Size: 34mm Weight: 37,08g The Calatrava was first launched in 1932 and has continually pared simplicity and functionality with stylish elegant designs. Beneath this apparent simplicity lies a highly precise mechanical movement, true to the know-how of the Geneva manufacture. It remains an emblematic testament to the avant-garde spirit of the 1970s.