This is an authentic OMEGA 18K Sedna Gold Alligator Diamond Green Aventurin 29mm Constellation Automatic Watch 131.23.29.20.99.001. The watch is crafted of 18 karat Sedna gold and features a green aventurin dial, diamond hour markers, green alligator strap, sapphire crystal, and a quartz movement. Follow this item for alerts. Omega is a registered trademark of Omega. FASHIONPHILE is not affiliated with Omega.