Patek Philippe. A lady's 18K gold manual wind bracelet watch with sigma dial Ellipse, Ref 4826/19, Circa 1970Patek Philippe. A lady's 18K gold manual wind bracelet watch with sigma dialModel: EllipseReference: 4826/19Date: Circa 1970Movement: 18-jewel Cal.16-250 manual wind, adjusted to heat, cold, isochronism and 5 positions, No.1415031Dial: Sunburst blue, applied gold baton hour markers, gold baton handsCase: Brushed and polished oval form, snap on back, No.2919558Strap/Bracelet: Integral 18K gold chain linkBuckle/Clasp: Signed 18K gold folding claspSigned: Case, dial & movementSize: 22mm x 28mmNone