Gerald Genta. A large and unusual 18K pink gold octagonal self-winding water-resistant jump hour retrograde wristwatch with retrograde date

Gerald Genta. A large and unusual 18K pink gold octagonal self-winding water-resistant jump hour retrograde wristwatch with retrograde date
Signed Gérald Genta, Genève, Octo Biretro model, ref. OBR.Y.50, movement no. 04212, case no. 118'921, manufactured in 2005
Cal. GG7722 gilt-finished lever movement, 26 jewels, the black lacquered dial with arched rings for the retrograde white Arabic numerals, inner red lacquer ring for the retrograde minutes, pink gold dauphine hands, window for the jumping hours, arched ring for the retrograde date, in heavy octagonal water-resistant-type case with massive downturned lugs, glazed display back secured by eight pentagonal screws, beaded cabochon onyx-set crown, 18K gold Gérald Genta deployant clasp, case, dial and movement signed
43 mm. wide & 49 mm. overall length