Nautilus 5711 GRF The Best EditionMOVEMENT: Base Movement: Japanese Miyota 9015 Automatic at 28800vph,with Decorated Bridges/Plates and RotorCASE DIAMETER: 40mmTHICKNESS: 9mm DIAL COLOR: Black Dial CASE MATERIAL: 18k rose gold plated solid 316L stainless..