PATEK PHILIPPE, REF. 3604 18K YELLOW GOLD 'ELLIPSE' WATCH, Maker: Patek Philippe Model: Ellipse Reference number: 3604 Year: Circa 1980s Case size: Approx. 36 x 36 mm Case material: 18K yellow gold Dial: Textured gold Movement: Automatic Bracelet/Strap: Black leather with 18K yellow gold Patek Philippe deployant clasp Functions: Date aperture, , , ,