Rolex Daytona Steel Yellow Gold Zenith Movement Mens Watch 16523. chronometer automatic self-winding movement. Zenith based chronograph. Stainless steel and 18K yellow gold case 40.0 mm in diameter. Special screw-down push buttons. Triplock winding crown protected by the crown guards. 18K yellow gold tachymeter engraved bezel. Scratch resistant sapphire crystal. Black dial with raised luminescent yellow gold baton hour markers. Outer 1/5th seconds track. Gold outlined subsidiary dials for the running seconds, 12 hour, and 30 minute registers. Yellow gold baton hands. Stainless steel and 18K yellow gold oyster bracelet with flip-lock clasp. Will fit a 7 3/4″ wrist.